diff --git a/.rubocop.yml b/.rubocop.yml
index 2b8fb300..45b62ddc 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -9,6 +9,19 @@ RSpec/MultipleMemoizedHelpers:
   Exclude:
     - spec/ttfunk/table/os2_spec.rb
 
+RSpec/SpecFilePathFormat:
+  CustomTransform:
+    TTFunk: ttfunk
+  Exclude:
+    - spec/ttfunk/table/cff/charstrings_index_spec.rb
+    - spec/ttfunk/table/cff/name_index_spec.rb
+
 Style/FormatStringToken:
   Exclude:
     - examples/metrics.rb
+
+
+Style/Documentation:
+  Exclude:
+    - examples/**/*.rb
+    - spec/**/*.rb
diff --git a/examples/metrics.rb b/examples/metrics.rb
index 4ce9a162..321a9c2c 100644
--- a/examples/metrics.rb
+++ b/examples/metrics.rb
@@ -3,21 +3,21 @@
 require_relative '../lib/ttfunk'
 
 def character_lookup(file, character)
-  puts "character     : #{character}"
+  puts("character     : #{character}")
 
   character_code = character.unpack1('U*')
-  puts "character code: #{character_code}"
+  puts("character code: #{character_code}")
 
   glyph_id = file.cmap.unicode.first[character_code]
-  puts "glyph id      : #{glyph_id}"
+  puts("glyph id      : #{glyph_id}")
 
   glyph = file.glyph_outlines.for(glyph_id)
-  puts format('glyph type    : %s', glyph.class.name.split(/::/).last.downcase)
-  puts format('glyph size    : %db', glyph.raw.length)
-  puts format('glyph bbox    : (%d,%d)-(%d,%d)', glyph.x_min, glyph.y_min, glyph.x_max, glyph.y_max)
+  puts(format('glyph type    : %s', glyph.class.name.split('::').last.downcase))
+  puts(format('glyph size    : %db', glyph.raw.length))
+  puts(format('glyph bbox    : (%d,%d)-(%d,%d)', glyph.x_min, glyph.y_min, glyph.x_max, glyph.y_max))
 
   if glyph.compound?
-    puts format('components    : %d %s', glyph.glyph_ids.length, glyph.glyph_ids.inspect)
+    puts(format('components    : %d %s', glyph.glyph_ids.length, glyph.glyph_ids.inspect))
   end
 end
 
diff --git a/examples/string_width.rb b/examples/string_width.rb
index b08e0fa1..09f014ba 100644
--- a/examples/string_width.rb
+++ b/examples/string_width.rb
@@ -16,12 +16,12 @@ def initialize(path_to_file)
   end
 
   def width_of(string)
-    string.split('').sum { |char| character_width(char) }
+    string.chars.sum { |char| character_width(char) }
   end
 
   def character_width(character)
     width_in_units = horizontal_metrics.for(glyph_id(character)).advance_width
-    width_in_units.to_f / units_per_em
+    Float(width_in_units) / units_per_em
   end
 
   def units_per_em
diff --git a/lib/ttfunk/bin_utils.rb b/lib/ttfunk/bin_utils.rb
index 1599aaf9..2552c47f 100644
--- a/lib/ttfunk/bin_utils.rb
+++ b/lib/ttfunk/bin_utils.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-module TTFunk
+module TTFunk # rubocop: disable Style/Documentation # false positive
   # Bit crunching utility methods.
   module BinUtils
     # Turn a bunch of small integers into one big integer. Assumes big-endian.
@@ -12,7 +12,7 @@ def stitch_int(arr, bit_width:)
       value = 0
 
       arr.each_with_index do |element, index|
-        value |= element << bit_width * index
+        value |= element << (bit_width * index)
       end
 
       value
@@ -26,10 +26,10 @@ def stitch_int(arr, bit_width:)
     #   needed for cases where top bits are zero.
     # @return [Array<Integer>]
     def slice_int(value, bit_width:, slice_count:)
-      mask = 2**bit_width - 1
+      mask = (2**bit_width) - 1
 
       Array.new(slice_count) do |i|
-        (value >> bit_width * i) & mask
+        (value >> (bit_width * i)) & mask
       end
     end
 
diff --git a/lib/ttfunk/bit_field.rb b/lib/ttfunk/bit_field.rb
index 7a8d4f48..af201684 100644
--- a/lib/ttfunk/bit_field.rb
+++ b/lib/ttfunk/bit_field.rb
@@ -25,7 +25,7 @@ def on(pos)
     # @param pos [Integer]
     # @return [Boolean]
     def on?(pos)
-      (value & 2**pos).positive?
+      (value & (2**pos)).positive?
     end
 
     # Set bit off.
@@ -33,7 +33,7 @@ def on?(pos)
     # @param pos [Integer]
     # @return [void]
     def off(pos)
-      @value &= 2**Math.log2(value).ceil - 2**pos - 1
+      @value &= (2**Math.log2(value).ceil) - (2**pos) - 1
     end
 
     # Is bit off?
diff --git a/lib/ttfunk/collection.rb b/lib/ttfunk/collection.rb
index d67fbe83..65007332 100644
--- a/lib/ttfunk/collection.rb
+++ b/lib/ttfunk/collection.rb
@@ -17,12 +17,12 @@ class Collection
     #   @return [any] whatever the block returns
     def self.open(path)
       if path.respond_to?(:read)
-        result = yield new(path)
+        result = yield(new(path))
         path.rewind
         result
       else
         ::File.open(path, 'rb') do |io|
-          yield new(io)
+          yield(new(io))
         end
       end
     end
@@ -55,7 +55,7 @@ def count
     # @return [self]
     def each
       count.times do |index|
-        yield self[index]
+        yield(self[index])
       end
       self
     end
diff --git a/lib/ttfunk/directory.rb b/lib/ttfunk/directory.rb
index fb4fe6cc..742952db 100644
--- a/lib/ttfunk/directory.rb
+++ b/lib/ttfunk/directory.rb
@@ -26,7 +26,7 @@ def initialize(io, offset = 0)
           tag: tag,
           checksum: checksum,
           offset: offset,
-          length: length
+          length: length,
         }
       end
     end
diff --git a/lib/ttfunk/encoded_string.rb b/lib/ttfunk/encoded_string.rb
index 0ede2244..693d6579 100644
--- a/lib/ttfunk/encoded_string.rb
+++ b/lib/ttfunk/encoded_string.rb
@@ -22,7 +22,7 @@ class DuplicatePlaceholderError < StandardError
   class EncodedString
     # @yieldparam [self]
     def initialize
-      yield self if block_given?
+      yield(self) if block_given?
     end
 
     # Append to string.
@@ -35,7 +35,7 @@ def <<(obj)
         io << obj
       when Placeholder
         add_placeholder(obj)
-        io << "\0" * obj.length
+        io << ("\0" * obj.length)
       when self.class
         # adjust placeholders to be relative to the entire encoded string
         obj.placeholders.each_pair do |_, placeholder|
@@ -65,7 +65,7 @@ def concat(*objs)
     # @return [self]
     def align!(width = 4)
       if (length % width).positive?
-        self << "\0" * (width - length % width)
+        self << ("\0" * (width - (length % width)))
       end
 
       self
diff --git a/lib/ttfunk/otf_encoder.rb b/lib/ttfunk/otf_encoder.rb
index fb6affe6..2d7f8c15 100644
--- a/lib/ttfunk/otf_encoder.rb
+++ b/lib/ttfunk/otf_encoder.rb
@@ -4,9 +4,7 @@ module TTFunk
   # Encodes a CFF-based OpenType font subset to its binary representation.
   class OTFEncoder < TTFEncoder
     # Optimal table order according to OpenType specification.
-    OPTIMAL_TABLE_ORDER = [
-      'head', 'hhea', 'maxp', 'OS/2', 'name', 'cmap', 'post', 'CFF '
-    ].freeze
+    OPTIMAL_TABLE_ORDER = ['head', 'hhea', 'maxp', 'OS/2', 'name', 'cmap', 'post', 'CFF '].freeze
 
     private
 
@@ -40,7 +38,7 @@ def tables
       @tables ||= super.merge(
         'BASE' => base_table,
         'VORG' => vorg_table,
-        'CFF ' => cff_table
+        'CFF ' => cff_table,
       ).compact
     end
 
diff --git a/lib/ttfunk/reader.rb b/lib/ttfunk/reader.rb
index bfed3001..6ec321dd 100644
--- a/lib/ttfunk/reader.rb
+++ b/lib/ttfunk/reader.rb
@@ -25,7 +25,7 @@ def to_signed(number)
     def parse_from(position)
       saved = io.pos
       io.pos = position
-      result = yield position
+      result = yield(position)
       io.pos = saved
       result
     end
@@ -38,12 +38,12 @@ def hexdump(string)
         if ((i + 1) % 16).zero?
           puts
         elsif ((i + 1) % 8).zero?
-          print '  '
+          print('  ')
         else
-          print ' '
+          print(' ')
         end
       end
-      puts unless (bytes.length % 16).zero?
+      puts if (bytes.length % 16) != 0
     end
   end
 end
diff --git a/lib/ttfunk/resource_file.rb b/lib/ttfunk/resource_file.rb
index 466bb9d2..38e7b555 100644
--- a/lib/ttfunk/resource_file.rb
+++ b/lib/ttfunk/resource_file.rb
@@ -14,10 +14,10 @@ class ResourceFile
     # @yieldparam resource_file [TTFunk::ResourceFile]
     # @return [any] result of the block
     def self.open(path)
-      ::File.open(path, 'rb') do |io|
+      ::File.open(path, 'rb') { |io|
         file = new(io)
-        yield file
-      end
+        yield(file)
+      }
     end
 
     # @param io [IO]
@@ -51,7 +51,7 @@ def initialize(io)
               id: id,
               attributes: attr,
               offset: data_ofs,
-              handle: handle
+              handle: handle,
             }
 
             if name_list_offset + name_ofs < map_offset + map_length
@@ -95,7 +95,7 @@ def [](type, index = 0)
     # @param type [String]
     # @return [Array<String>]
     def resources_for(type)
-      (@map[type] && @map[type][:named] || {}).keys
+      ((@map[type] && @map[type][:named]) || {}).keys
     end
 
     private
diff --git a/lib/ttfunk/sci_form.rb b/lib/ttfunk/sci_form.rb
index 0d407c95..05096728 100644
--- a/lib/ttfunk/sci_form.rb
+++ b/lib/ttfunk/sci_form.rb
@@ -3,7 +3,6 @@
 module TTFunk
   # Scientific number representation
   class SciForm
-    alias eql? ==
     # Significand
     # @return [Float, Integer]
     attr_reader :significand
@@ -23,7 +22,7 @@ def initialize(significand, exponent = 0)
     #
     # @return [Float]
     def to_f
-      significand * 10**exponent
+      significand * (10**exponent)
     end
 
     # Check equality to another number.
@@ -41,5 +40,7 @@ def ==(other)
         false
       end
     end
+
+    alias eql? ==
   end
 end
diff --git a/lib/ttfunk/sub_table.rb b/lib/ttfunk/sub_table.rb
index a781f656..9d1539cb 100644
--- a/lib/ttfunk/sub_table.rb
+++ b/lib/ttfunk/sub_table.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require_relative './reader'
+require_relative 'reader'
 
 module TTFunk
   # SFNT sub-table
diff --git a/lib/ttfunk/subset/code_page.rb b/lib/ttfunk/subset/code_page.rb
index 1caf9f1c..66e2822f 100644
--- a/lib/ttfunk/subset/code_page.rb
+++ b/lib/ttfunk/subset/code_page.rb
@@ -113,7 +113,6 @@ def new_cmap_table
           end
       end
 
-
       # Get the list of Glyph IDs from the original font that are in this
       # subset.
       #
diff --git a/lib/ttfunk/table.rb b/lib/ttfunk/table.rb
index aba96bc2..ac43629a 100644
--- a/lib/ttfunk/table.rb
+++ b/lib/ttfunk/table.rb
@@ -55,7 +55,7 @@ def raw
     #
     # @return [String]
     def tag
-      self.class.name.split(/::/).last.downcase
+      self.class.name.split('::').last.downcase
     end
 
     private
diff --git a/lib/ttfunk/table/cff.rb b/lib/ttfunk/table/cff.rb
index ca5eef22..61c7ce2e 100644
--- a/lib/ttfunk/table/cff.rb
+++ b/lib/ttfunk/table/cff.rb
@@ -67,7 +67,7 @@ def encode(subset)
             name_index.encode,
             top_index.encode,
             string_index.encode,
-            global_subr_index.encode
+            global_subr_index.encode,
           )
 
           charmap = subset.new_cmap_table[:charmap]
@@ -80,18 +80,9 @@ def encode(subset)
       def parse!
         @header = Header.new(file, offset)
         @name_index = Index.new(file, @header.table_offset + @header.length)
-
-        @top_index = TopIndex.new(
-          file, @name_index.table_offset + @name_index.length
-        )
-
-        @string_index = OneBasedIndex.new(
-          file, @top_index.table_offset + @top_index.length
-        )
-
-        @global_subr_index = SubrIndex.new(
-          file, @string_index.table_offset + @string_index.length
-        )
+        @top_index = TopIndex.new(file, @name_index.table_offset + @name_index.length)
+        @string_index = OneBasedIndex.new(file, @top_index.table_offset + @top_index.length)
+        @global_subr_index = SubrIndex.new(file, @string_index.table_offset + @string_index.length)
       end
     end
   end
diff --git a/lib/ttfunk/table/cff/charset.rb b/lib/ttfunk/table/cff/charset.rb
index 1c0385b5..c4a87ee5 100644
--- a/lib/ttfunk/table/cff/charset.rb
+++ b/lib/ttfunk/table/cff/charset.rb
@@ -111,7 +111,7 @@ def each
           return to_enum(__method__) unless block_given?
 
           # +1 adjusts for the implicit .notdef glyph
-          (items_count + 1).times { |i| yield self[i] }
+          (items_count + 1).times { |i| yield(self[i]) }
         end
 
         # Get character name for glyph index.
@@ -256,7 +256,7 @@ def element_width(fmt = format_sym)
           {
             array_format: 2, # SID
             range_format8: 3, # SID + Card8
-            range_format16: 4 # SID + Card16
+            range_format16: 4, # SID + Card16
           }[fmt]
         end
 
@@ -264,7 +264,7 @@ def element_format(fmt = format_sym)
           {
             array_format: 'n',
             range_format8: 'nC',
-            range_format16: 'nn'
+            range_format16: 'nn',
           }[fmt]
         end
 
@@ -282,7 +282,7 @@ def format_int(sym = format_sym)
           {
             array_format: ARRAY_FORMAT,
             range_format8: RANGE_FORMAT_8,
-            range_format16: RANGE_FORMAT_16
+            range_format16: RANGE_FORMAT_16,
           }[sym]
         end
       end
diff --git a/lib/ttfunk/table/cff/charsets/expert.rb b/lib/ttfunk/table/cff/charsets/expert.rb
index 07621ac9..adeb23f2 100644
--- a/lib/ttfunk/table/cff/charsets/expert.rb
+++ b/lib/ttfunk/table/cff/charsets/expert.rb
@@ -181,8 +181,8 @@ module Charsets
             'Ucircumflexsmall',
             'Udieresissmall',
             'Yacutesmall',
-            'Thornsmall'
-          ]
+            'Thornsmall',
+          ],
         ).freeze
       end
     end
diff --git a/lib/ttfunk/table/cff/charsets/expert_subset.rb b/lib/ttfunk/table/cff/charsets/expert_subset.rb
index a6488d28..85f03257 100644
--- a/lib/ttfunk/table/cff/charsets/expert_subset.rb
+++ b/lib/ttfunk/table/cff/charsets/expert_subset.rb
@@ -111,8 +111,8 @@ module Charsets
             'nineinferior',
             'centinferior',
             'dollarinferior',
-            'periodinferior'
-          ]
+            'periodinferior',
+          ],
         ).freeze
       end
     end
diff --git a/lib/ttfunk/table/cff/charsets/iso_adobe.rb b/lib/ttfunk/table/cff/charsets/iso_adobe.rb
index 7a2ec4b9..c99ee209 100644
--- a/lib/ttfunk/table/cff/charsets/iso_adobe.rb
+++ b/lib/ttfunk/table/cff/charsets/iso_adobe.rb
@@ -233,8 +233,8 @@ module Charsets
             'ugrave',
             'yacute',
             'ydieresis',
-            'zcaron'
-          ]
+            'zcaron',
+          ],
         ).freeze
       end
     end
diff --git a/lib/ttfunk/table/cff/charsets/standard_strings.rb b/lib/ttfunk/table/cff/charsets/standard_strings.rb
index bbb5614d..c1ec8621 100644
--- a/lib/ttfunk/table/cff/charsets/standard_strings.rb
+++ b/lib/ttfunk/table/cff/charsets/standard_strings.rb
@@ -396,8 +396,8 @@ module Charsets
             'Medium',
             'Regular',
             'Roman',
-            'Semibold'
-          ]
+            'Semibold',
+          ],
         ).freeze
       end
     end
diff --git a/lib/ttfunk/table/cff/charstring.rb b/lib/ttfunk/table/cff/charstring.rb
index 22bb905b..fd3f947c 100644
--- a/lib/ttfunk/table/cff/charstring.rb
+++ b/lib/ttfunk/table/cff/charstring.rb
@@ -30,7 +30,7 @@ class Charstring
           28 => :shortint,
           29 => :callgsubr,
           30 => :vhcurveto,
-          31 => :hvcurveto
+          31 => :hvcurveto,
         }.freeze
 
         # Type 2 Flex operators.
@@ -38,7 +38,7 @@ class Charstring
           35 => :flex,
           34 => :hflex,
           36 => :hflex1,
-          37 => :flex1
+          37 => :flex1,
         }.freeze
 
         # Glyph ID.
@@ -112,7 +112,7 @@ def render(x: 0, y: 0, font_size: 72)
             x: x,
             y: y,
             font_size: font_size,
-            units_per_em: @top_dict.file.header.units_per_em
+            units_per_em: @top_dict.file.header.units_per_em,
           )
         end
 
@@ -127,22 +127,22 @@ def parse!
             next if code == 11
 
             if code >= 32 && code <= 246
-              @stack << code - 139
+              @stack << (code - 139)
             elsif (m = CODE_MAP[code])
               __send__(m)
             elsif code >= 247 && code <= 250
               b0 = code
               b1 = @data[@index]
               @index += 1
-              @stack << (b0 - 247) * 256 + b1 + 108
+              @stack << (((b0 - 247) * 256) + b1 + 108)
             elsif code >= 251 && code <= 254
               b0 = code
               b1 = @data[@index]
               @index += 1
-              @stack << -(b0 - 251) * 256 - b1 - 108
+              @stack << ((-(b0 - 251) * 256) - b1 - 108)
             else
               b1, b2, b3, b4 = read_bytes(4)
-              @stack << ((b1 << 24) | (b2 << 16) | (b3 << 8) | b4) / 65_536
+              @stack << (((b1 << 24) | (b2 << 16) | (b3 << 8) | b4) / 65_536)
             end
           end
         end
diff --git a/lib/ttfunk/table/cff/charstrings_index.rb b/lib/ttfunk/table/cff/charstrings_index.rb
index 0fc9173b..be8c3e47 100644
--- a/lib/ttfunk/table/cff/charstrings_index.rb
+++ b/lib/ttfunk/table/cff/charstrings_index.rb
@@ -22,9 +22,7 @@ def initialize(top_dict, *remaining_args)
         private
 
         def decode_item(index, _offset, _length)
-          TTFunk::Table::Cff::Charstring.new(
-            index, top_dict, font_dict_for(index), super
-          )
+          TTFunk::Table::Cff::Charstring.new(index, top_dict, font_dict_for(index), super)
         end
 
         def encode_items(charmap)
diff --git a/lib/ttfunk/table/cff/dict.rb b/lib/ttfunk/table/cff/dict.rb
index 710118cf..7aeee255 100644
--- a/lib/ttfunk/table/cff/dict.rb
+++ b/lib/ttfunk/table/cff/dict.rb
@@ -68,10 +68,11 @@ def each(&block)
         # @return [String]
         def encode
           sort_by(&:first)
-          .map do |(operator, operands)|
-            operands.map { |operand| encode_operand(operand) }.join +
-              encode_operator(operator)
-          end.join
+            .map { |(operator, operands)|
+              operands.map { |operand| encode_operand(operand) }.join +
+                encode_operator(operator)
+            }
+            .join
         end
 
         private
@@ -80,7 +81,7 @@ def encode_operator(operator)
           if operator >= WIDE_OPERATOR_ADJUSTMENT
             [
               WIDE_OPERATOR_BZERO,
-              operator - WIDE_OPERATOR_ADJUSTMENT
+              operator - WIDE_OPERATOR_ADJUSTMENT,
             ].pack('C*')
           else
             [operator].pack('C')
@@ -143,7 +144,7 @@ def encode_significand(sig)
           sig.to_s.each_char.with_object([]) do |char, ret|
             case char
             when '0'..'9'
-              ret << char.to_i
+              ret << Integer(char)
             when '.'
               ret << 0xA
             when '-'
@@ -160,7 +161,7 @@ def pack_decimal_nibbles(nibbles)
           nibbles.each_slice(2).each do |(high_nb, low_nb)|
             # low_nb can be nil if nibbles contains an odd number of elements
             low_nb ||= 0xF
-            bytes << (high_nb << 4 | low_nb)
+            bytes << ((high_nb << 4) | low_nb)
           end
 
           bytes << 0xFF if nibbles.size.even?
@@ -186,8 +187,7 @@ def parse!
 
               if operands.size > MAX_OPERANDS
                 raise TooManyOperandsError,
-                  'found one too many operands at '\
-                  "position #{io.pos} in dict at position #{table_offset}"
+                  "found one too many operands at position #{io.pos} in dict at position #{table_offset}"
               end
             else
               raise Error, "dict byte value #{b_zero} is reserved"
@@ -248,9 +248,9 @@ def decode_sci
         def validate_sci!(significand, exponent)
           unless valid_significand?(significand) && valid_exponent?(exponent)
             raise InvalidOperandError,
-              'invalid scientific notation operand with significand '\
-              "'#{significand}' and exponent '#{exponent}' ending at "\
-              "position #{io.pos} in dict at position #{table_offset}"
+              'invalid scientific notation operand with significand ' \
+                "'#{significand}' and exponent '#{exponent}' ending at " \
+                "position #{io.pos} in dict at position #{table_offset}"
           end
         end
 
@@ -274,24 +274,22 @@ def decode_integer(b_zero)
           when 247..250
             # 2 bytes
             b_one = read(1, 'C').first
-            (b_zero - 247) * 256 + b_one + 108
+            ((b_zero - 247) * 256) + b_one + 108
 
           when 251..254
             # 2 bytes
             b_one = read(1, 'C').first
-            -(b_zero - 251) * 256 - b_one - 108
+            (-(b_zero - 251) * 256) - b_one - 108
 
           when 28
             # 2 bytes in number (3 total)
             b_one, b_two = read(2, 'C*')
-            BinUtils.twos_comp_to_int(b_one << 8 | b_two, bit_width: 16)
+            BinUtils.twos_comp_to_int((b_one << 8) | b_two, bit_width: 16)
 
           when 29
             # 4 bytes in number (5 total)
             b_one, b_two, b_three, b_four = read(4, 'C*')
-            BinUtils.twos_comp_to_int(
-              b_one << 24 | b_two << 16 | b_three << 8 | b_four, bit_width: 32
-            )
+            BinUtils.twos_comp_to_int((b_one << 24) | (b_two << 16) | (b_three << 8) | b_four, bit_width: 32)
           end
         end
       end
diff --git a/lib/ttfunk/table/cff/encoding.rb b/lib/ttfunk/table/cff/encoding.rb
index e2e59cc6..efa04e34 100644
--- a/lib/ttfunk/table/cff/encoding.rb
+++ b/lib/ttfunk/table/cff/encoding.rb
@@ -13,7 +13,6 @@ class Encoding < TTFunk::SubTable
         # Predefined Expert Encoding ID.
         EXPERT_ENCODING_ID = 1
 
-
         # Default encoding ID.
         DEFAULT_ENCODING_ID = STANDARD_ENCODING_ID
 
@@ -81,7 +80,7 @@ def each
           return to_enum(__method__) unless block_given?
 
           # +1 adjusts for the implicit .notdef glyph
-          (items_count + 1).times { |i| yield self[i] }
+          (items_count + 1).times { |i| yield(self[i]) }
         end
 
         # Get character code for glyph index.
@@ -237,7 +236,7 @@ def element_format(fmt = format_sym)
           {
             array_format: 'C',
             range_format: 'CC',
-            supplemental: 'Cn'
+            supplemental: 'Cn',
           }[fmt]
         end
 
diff --git a/lib/ttfunk/table/cff/encodings/expert.rb b/lib/ttfunk/table/cff/encodings/expert.rb
index 681274a1..5c2b7f89 100644
--- a/lib/ttfunk/table/cff/encodings/expert.rb
+++ b/lib/ttfunk/table/cff/encodings/expert.rb
@@ -198,8 +198,8 @@ module Encodings
             375,
             376,
             377,
-            378
-          ]
+            378,
+          ],
         ).freeze
       end
     end
diff --git a/lib/ttfunk/table/cff/encodings/standard.rb b/lib/ttfunk/table/cff/encodings/standard.rb
index e83109a3..3f0afaa0 100644
--- a/lib/ttfunk/table/cff/encodings/standard.rb
+++ b/lib/ttfunk/table/cff/encodings/standard.rb
@@ -173,8 +173,8 @@ module Encodings
             147,
             148,
             149,
-            *[0] * 4
-          ]
+            *[0] * 4,
+          ],
         ).freeze
       end
     end
diff --git a/lib/ttfunk/table/cff/fd_selector.rb b/lib/ttfunk/table/cff/fd_selector.rb
index 3a640fea..b2f01a82 100644
--- a/lib/ttfunk/table/cff/fd_selector.rb
+++ b/lib/ttfunk/table/cff/fd_selector.rb
@@ -59,15 +59,15 @@ def [](glyph_id)
             end
 
             range, entry =
-              entries.bsearch do |rng, _|
-              if rng.cover?(glyph_id)
-                0
-              elsif glyph_id < rng.first
-                -1
-              else
-                1
-              end
-            end
+              entries.bsearch { |rng, _|
+                if rng.cover?(glyph_id)
+                  0
+                elsif glyph_id < rng.first
+                  -1
+                else
+                  1
+                end
+              }
 
             range.each { |i| range_cache[i] = entry }
             entry
@@ -81,7 +81,7 @@ def [](glyph_id)
         def each
           return to_enum(__method__) unless block_given?
 
-          items_count.times { |i| yield self[i] }
+          items_count.times { |i| yield(self[i]) }
         end
 
         # Encode Font dict selector.
@@ -162,11 +162,11 @@ def parse!
             ranges = Array.new(num_ranges) { read(RANGE_ENTRY_SIZE, 'nC') }
 
             @entries =
-              ranges.each_cons(2).map do |first, second|
+              ranges.each_cons(2).map { |first, second|
                 first_gid, fd_index = first
                 second_gid, = second
                 [(first_gid...second_gid), fd_index]
-              end
+              }
 
             # read the sentinel GID, otherwise known as the number of glyphs
             # in the font
diff --git a/lib/ttfunk/table/cff/font_dict.rb b/lib/ttfunk/table/cff/font_dict.rb
index b1885f50..be979b71 100644
--- a/lib/ttfunk/table/cff/font_dict.rb
+++ b/lib/ttfunk/table/cff/font_dict.rb
@@ -54,13 +54,8 @@ def finalize(new_cff_data)
           encoded_offset = encode_integer32(new_cff_data.length)
           encoded_length = encode_integer32(encoded_private_dict.length)
 
-          new_cff_data.resolve_placeholder(
-            :"private_length_#{@table_offset}", encoded_length
-          )
-
-          new_cff_data.resolve_placeholder(
-            :"private_offset_#{@table_offset}", encoded_offset
-          )
+          new_cff_data.resolve_placeholder(:"private_length_#{@table_offset}", encoded_length)
+          new_cff_data.resolve_placeholder(:"private_offset_#{@table_offset}", encoded_offset)
 
           private_dict.finalize(encoded_private_dict)
           new_cff_data << encoded_private_dict
@@ -77,7 +72,7 @@ def private_dict
               PrivateDict.new(
                 file,
                 top_dict.cff_offset + private_dict_offset,
-                private_dict_length
+                private_dict_length,
               )
             end
         end
@@ -86,13 +81,8 @@ def private_dict
 
         def encode_private
           EncodedString.new do |result|
-            result << Placeholder.new(
-              :"private_length_#{@table_offset}", length: PLACEHOLDER_LENGTH
-            )
-
-            result << Placeholder.new(
-              :"private_offset_#{@table_offset}", length: PLACEHOLDER_LENGTH
-            )
+            result << Placeholder.new(:"private_length_#{@table_offset}", length: PLACEHOLDER_LENGTH)
+            result << Placeholder.new(:"private_offset_#{@table_offset}", length: PLACEHOLDER_LENGTH)
           end
         end
       end
diff --git a/lib/ttfunk/table/cff/font_index.rb b/lib/ttfunk/table/cff/font_index.rb
index 9cb34703..d458ecac 100644
--- a/lib/ttfunk/table/cff/font_index.rb
+++ b/lib/ttfunk/table/cff/font_index.rb
@@ -29,9 +29,7 @@ def finalize(new_cff_data)
         private
 
         def decode_item(_index, offset, length)
-          TTFunk::Table::Cff::FontDict.new(
-            top_dict, file, offset, length
-          )
+          TTFunk::Table::Cff::FontDict.new(top_dict, file, offset, length)
         end
 
         def encode_items(*)
diff --git a/lib/ttfunk/table/cff/index.rb b/lib/ttfunk/table/cff/index.rb
index 18ac407e..10aaaacb 100644
--- a/lib/ttfunk/table/cff/index.rb
+++ b/lib/ttfunk/table/cff/index.rb
@@ -18,7 +18,7 @@ def [](index)
             decode_item(
               index,
               data_reference_offset + offsets[index],
-              offsets[index + 1] - offsets[index]
+              offsets[index + 1] - offsets[index],
             )
         end
 
@@ -33,7 +33,7 @@ def each(&block)
           return to_enum(__method__) unless block
 
           items_count.times do |i|
-            yield self[i]
+            yield(self[i])
           end
         end
 
@@ -61,9 +61,9 @@ def encode(*args)
 
           offsets_array =
             new_items
-              .each_with_object([1]) do |item, offsets|
-                offsets << offsets.last + item.length
-              end
+              .each_with_object([1]) { |item, offsets|
+                offsets << (offsets.last + item.length)
+              }
 
           offset_size = (offsets_array.last.bit_length / 8.0).ceil
 
@@ -72,13 +72,15 @@ def encode(*args)
           EncodedString.new.concat(
             [new_items.length, offset_size].pack('nC'),
             *offsets_array,
-            *new_items
+            *new_items,
           )
         end
 
         private
 
-        attr_reader :items, :offsets, :data_reference_offset
+        attr_reader :items
+        attr_reader :offsets
+        attr_reader :data_reference_offset
 
         def entry_cache
           @entry_cache ||= {}
@@ -128,22 +130,22 @@ def parse!
           offset_size = read(1, 'C').first
 
           @offsets =
-            Array.new(num_entries + 1) do
+            Array.new(num_entries + 1) {
               unpack_offset(io.read(offset_size), offset_size)
-            end
+            }
 
-          @data_reference_offset = table_offset + 3 + offsets.length * offset_size - 1
+          @data_reference_offset = table_offset + 3 + (offsets.length * offset_size) - 1
 
           @length =
             2 + # num entries
             1 + # offset size
-            offsets.length * offset_size + # offsets
+            (offsets.length * offset_size) + # offsets
             offsets.last - 1 # items
 
           @items =
-            offsets.each_cons(2).map do |offset, next_offset|
+            offsets.each_cons(2).map { |offset, next_offset|
               io.read(next_offset - offset)
-            end
+            }
         end
 
         def unpack_offset(offset_data, offset_size)
diff --git a/lib/ttfunk/table/cff/path.rb b/lib/ttfunk/table/cff/path.rb
index 1fc3eff5..4e2f9040 100644
--- a/lib/ttfunk/table/cff/path.rb
+++ b/lib/ttfunk/table/cff/path.rb
@@ -50,7 +50,7 @@ def line_to(x, y)
         # @param x [Integer, Float]
         # @param y [Integer, Float]
         # @return [void]
-        def curve_to(x1, y1, x2, y2, x, y) # rubocop: disable Metrics/ParameterLists,Style/CommentedKeyword
+        def curve_to(x1, y1, x2, y2, x, y) # rubocop: disable Metrics/ParameterLists
           @commands << [:curve, x1, y1, x2, y2, x, y]
         end
 
@@ -86,7 +86,7 @@ def render(x: 0, y: 0, font_size: 72, units_per_em: 1000)
                 x + (cmd[3] * scale),
                 y + (-cmd[4] * scale),
                 x + (cmd[5] * scale),
-                y + (-cmd[6] * scale)
+                y + (-cmd[6] * scale),
               )
             when :close
               new_path.close_path
diff --git a/lib/ttfunk/table/cff/private_dict.rb b/lib/ttfunk/table/cff/private_dict.rb
index 74f6e091..1b542665 100644
--- a/lib/ttfunk/table/cff/private_dict.rb
+++ b/lib/ttfunk/table/cff/private_dict.rb
@@ -18,7 +18,7 @@ class PrivateDict < TTFunk::Table::Cff::Dict
         OPERATORS = {
           subrs: 19,
           default_width_x: 20,
-          nominal_width_x: 21
+          nominal_width_x: 21,
         }.freeze
 
         # Inverse operator mapping.
@@ -54,9 +54,7 @@ def finalize(private_dict_data)
           encoded_subr_index = subr_index.encode
           encoded_offset = encode_integer32(private_dict_data.length)
 
-          private_dict_data.resolve_placeholder(
-            :"subrs_#{@table_offset}", encoded_offset
-          )
+          private_dict_data.resolve_placeholder(:"subrs_#{@table_offset}", encoded_offset)
 
           private_dict_data << encoded_subr_index
         end
@@ -97,9 +95,7 @@ def nominal_width_x
 
         def encode_subrs
           EncodedString.new do |result|
-            result << Placeholder.new(
-              :"subrs_#{@table_offset}", length: PLACEHOLDER_LENGTH
-            )
+            result << Placeholder.new(:"subrs_#{@table_offset}", length: PLACEHOLDER_LENGTH)
           end
         end
       end
diff --git a/lib/ttfunk/table/cff/top_dict.rb b/lib/ttfunk/table/cff/top_dict.rb
index 0431e72a..576fb0c8 100644
--- a/lib/ttfunk/table/cff/top_dict.rb
+++ b/lib/ttfunk/table/cff/top_dict.rb
@@ -22,14 +22,14 @@ class TopDict < TTFunk::Table::Cff::Dict
           charstrings_index: 17,
           private: 18,
           font_index: 1236,
-          font_dict_selector: 1237
+          font_dict_selector: 1237,
         }.freeze
 
         # All the operators we currently care about.
         OPERATORS = {
           **POINTER_OPERATORS,
           ros: 1230,
-          charstring_type: 1206
+          charstring_type: 1206,
         }.freeze
 
         # Inverse operator mapping.
@@ -46,7 +46,7 @@ def encode(*)
               elsif pointer_operator?(operator)
                 result << Placeholder.new(
                   OPERATOR_CODES[operator],
-                  length: POINTER_PLACEHOLDER_LENGTH
+                  length: POINTER_PLACEHOLDER_LENGTH,
                 )
               else
                 operands.each { |operand| result << encode_operand(operand) }
@@ -67,41 +67,25 @@ def encode(*)
         # @return [void]
         def finalize(new_cff_data, charmap)
           if charset
-            finalize_subtable(
-              new_cff_data, :charset, charset.encode(charmap)
-            )
+            finalize_subtable(new_cff_data, :charset, charset.encode(charmap))
           end
 
           if encoding
-            finalize_subtable(
-              new_cff_data, :encoding, encoding.encode(charmap)
-            )
+            finalize_subtable(new_cff_data, :encoding, encoding.encode(charmap))
           end
 
           if charstrings_index
-            finalize_subtable(
-              new_cff_data,
-              :charstrings_index,
-              charstrings_index.encode(charmap)
-            )
+            finalize_subtable(new_cff_data, :charstrings_index, charstrings_index.encode(charmap))
           end
 
           if font_index
-            finalize_subtable(
-              new_cff_data,
-              :font_index,
-              font_index.encode
-            )
+            finalize_subtable(new_cff_data, :font_index, font_index.encode)
 
             font_index.finalize(new_cff_data)
           end
 
           if font_dict_selector
-            finalize_subtable(
-              new_cff_data,
-              :font_dict_selector,
-              font_dict_selector.encode(charmap)
-            )
+            finalize_subtable(new_cff_data, :font_dict_selector, font_dict_selector.encode(charmap))
           end
 
           if private_dict
@@ -109,13 +93,8 @@ def finalize(new_cff_data, charmap)
             encoded_offset = encode_integer32(new_cff_data.length)
             encoded_length = encode_integer32(encoded_private_dict.length)
 
-            new_cff_data.resolve_placeholder(
-              :"private_length_#{@table_offset}", encoded_length
-            )
-
-            new_cff_data.resolve_placeholder(
-              :"private_offset_#{@table_offset}", encoded_offset
-            )
+            new_cff_data.resolve_placeholder(:"private_length_#{@table_offset}", encoded_length)
+            new_cff_data.resolve_placeholder(:"private_offset_#{@table_offset}", encoded_offset)
 
             private_dict.finalize(encoded_private_dict)
             new_cff_data << encoded_private_dict
@@ -178,9 +157,7 @@ def encoding
         def charstrings_index
           @charstrings_index ||=
             if (charstrings_offset = self[OPERATORS[:charstrings_index]])
-              CharstringsIndex.new(
-                self, file, cff_offset + charstrings_offset.first
-              )
+              CharstringsIndex.new(self, file, cff_offset + charstrings_offset.first)
             end
         end
 
@@ -220,9 +197,7 @@ def private_dict
             if (info = self[OPERATORS[:private]])
               private_dict_length, private_dict_offset = info
 
-              PrivateDict.new(
-                file, cff_offset + private_dict_offset, private_dict_length
-              )
+              PrivateDict.new(file, cff_offset + private_dict_offset, private_dict_length)
             end
         end
 
@@ -246,12 +221,12 @@ def encode_private
           EncodedString.new do |result|
             result << Placeholder.new(
               :"private_length_#{@table_offset}",
-              length: PLACEHOLDER_LENGTH
+              length: PLACEHOLDER_LENGTH,
             )
 
             result << Placeholder.new(
               :"private_offset_#{@table_offset}",
-              length: PLACEHOLDER_LENGTH
+              length: PLACEHOLDER_LENGTH,
             )
           end
         end
diff --git a/lib/ttfunk/table/cmap/format04.rb b/lib/ttfunk/table/cmap/format04.rb
index 0f62bee5..ab9001e4 100644
--- a/lib/ttfunk/table/cmap/format04.rb
+++ b/lib/ttfunk/table/cmap/format04.rb
@@ -77,10 +77,10 @@ def self.encode(charmap)
 
             if a - start_glyph_id >= 0x8000
               deltas << 0
-              range_offsets << 2 * (glyph_indices.length + segcount - segment)
+              range_offsets << (2 * (glyph_indices.length + segcount - segment))
               a.upto(b) { |code| glyph_indices << new_map[code][:new] }
             else
-              deltas << -a + start_glyph_id
+              deltas << (-a + start_glyph_id)
               range_offsets << 0
             end
 
@@ -89,14 +89,14 @@ def self.encode(charmap)
 
           # format, length, language
           subtable = [
-            4, 16 + 8 * segcount + 2 * glyph_indices.length, 0
+            4, 16 + (8 * segcount) + (2 * glyph_indices.length), 0,
           ].pack('nnn')
 
-          search_range = 2 * 2**(Math.log(segcount) / Math.log(2)).to_i
-          entry_selector = (Math.log(search_range / 2) / Math.log(2)).to_i
+          search_range = 2 * (2**Integer(Math.log(segcount) / Math.log(2)))
+          entry_selector = Integer(Math.log(search_range / 2) / Math.log(2))
           range_shift = (2 * segcount) - search_range
           subtable << [
-            segcount * 2, search_range, entry_selector, range_shift
+            segcount * 2, search_range, entry_selector, range_shift,
           ].pack('nnnn')
 
           subtable << end_codes.pack('n*') << "\0\0" << start_codes.pack('n*')
@@ -144,8 +144,7 @@ def parse_cmap!
               if (id_range_offset[i]).zero?
                 glyph_id = code + id_delta[i]
               else
-                index = id_range_offset[i] / 2 +
-                  (code - start_code[i]) - (segcount - i)
+                index = (id_range_offset[i] / 2) + (code - start_code[i]) - (segcount - i)
                 # Because some TTF fonts are broken
                 glyph_id = glyph_ids[index] || 0
                 glyph_id += id_delta[i] if glyph_id != 0
diff --git a/lib/ttfunk/table/cmap/format06.rb b/lib/ttfunk/table/cmap/format06.rb
index 403cac1f..3e6a68cd 100644
--- a/lib/ttfunk/table/cmap/format06.rb
+++ b/lib/ttfunk/table/cmap/format06.rb
@@ -45,7 +45,7 @@ def self.encode(charmap)
             end
 
           subtable = [
-            6, 10 + entry_count * 2, 0, low_char, entry_count, *glyph_indexes
+            6, 10 + (entry_count * 2), 0, low_char, entry_count, *glyph_indexes,
           ].pack('n*')
 
           { charmap: new_map, subtable: subtable, max_glyph_id: next_id + 1 }
diff --git a/lib/ttfunk/table/cmap/format10.rb b/lib/ttfunk/table/cmap/format10.rb
index b8008c2e..b6ed1ff8 100644
--- a/lib/ttfunk/table/cmap/format10.rb
+++ b/lib/ttfunk/table/cmap/format10.rb
@@ -45,8 +45,8 @@ def self.encode(charmap)
             end
 
           subtable = [
-            10, 0, 20 + entry_count * 4, 0, low_char, entry_count,
-            *glyph_indexes
+            10, 0, 20 + (entry_count * 4), 0, low_char, entry_count,
+            *glyph_indexes,
           ].pack('nnN*')
 
           { charmap: new_map, subtable: subtable, max_glyph_id: next_id + 1 }
diff --git a/lib/ttfunk/table/cmap/format12.rb b/lib/ttfunk/table/cmap/format12.rb
index 13ccd971..07c6dd34 100644
--- a/lib/ttfunk/table/cmap/format12.rb
+++ b/lib/ttfunk/table/cmap/format12.rb
@@ -52,13 +52,13 @@ def self.encode(charmap)
             end
 
           subtable = [
-            12, 0, 16 + 12 * range_lengths.size, 0, range_lengths.size
+            12, 0, 16 + (12 * range_lengths.size), 0, range_lengths.size,
           ].pack('nnNNN')
           range_lengths.each_with_index do |length, i|
             firstglyph = range_firstglyphs[i]
             firstcode = range_firstcodes[i]
             subtable << [
-              firstcode, firstcode + length - 1, firstglyph
+              firstcode, firstcode + length - 1, firstglyph,
             ].pack('NNN')
           end
 
diff --git a/lib/ttfunk/table/cmap/subtable.rb b/lib/ttfunk/table/cmap/subtable.rb
index 9d078a48..230cdb3b 100644
--- a/lib/ttfunk/table/cmap/subtable.rb
+++ b/lib/ttfunk/table/cmap/subtable.rb
@@ -34,7 +34,7 @@ class Subtable
           # Use microsoft unicode, instead of generic unicode, for optimal
           # Windows support
           unicode: { platform_id: 3, encoding_id: 1 }.freeze,
-          unicode_ucs4: { platform_id: 3, encoding_id: 10 }.freeze
+          unicode_ucs4: { platform_id: 3, encoding_id: 10 }.freeze,
         }.freeze
 
         # Encode encoding record.
@@ -76,8 +76,8 @@ def self.encode(charmap, encoding)
               mapping[:platform_id],
               mapping[:encoding_id],
               12,
-              result[:subtable]
-            ].pack('nnNA*')
+              result[:subtable],
+            ].pack('nnNA*'),
           )
         end
 
@@ -107,9 +107,8 @@ def initialize(file, table_start)
         #
         # @return [Boolean]
         def unicode?
-          platform_id == 3 && (encoding_id == 1 || encoding_id == 10) &&
-            format != 0 ||
-            platform_id.zero? && format != 0
+          (platform_id == 3 && (encoding_id == 1 || encoding_id == 10) && format != 0) ||
+            (platform_id.zero? && format != 0)
         end
 
         # Is this encoding record format supported?
diff --git a/lib/ttfunk/table/dsig.rb b/lib/ttfunk/table/dsig.rb
index 6aad3407..10fe836b 100644
--- a/lib/ttfunk/table/dsig.rb
+++ b/lib/ttfunk/table/dsig.rb
@@ -77,16 +77,16 @@ def parse!
         @version, num_signatures, @flags = read(8, 'Nnn')
 
         @signatures =
-          Array.new(num_signatures) do
+          Array.new(num_signatures) {
             format, length, sig_offset = read(12, 'N3')
             signature =
-              parse_from(offset + sig_offset) do
+              parse_from(offset + sig_offset) {
                 _, _, sig_length = read(8, 'nnN')
                 read(sig_length, 'C*')
-              end
+              }
 
             SignatureRecord.new(format, length, sig_offset, signature)
-          end
+          }
       end
     end
   end
diff --git a/lib/ttfunk/table/glyf/compound.rb b/lib/ttfunk/table/glyf/compound.rb
index 2cdcf53b..0f8fe157 100644
--- a/lib/ttfunk/table/glyf/compound.rb
+++ b/lib/ttfunk/table/glyf/compound.rb
@@ -58,7 +58,6 @@ class Compound
         # @return [Integer]
         attr_reader :y_max
 
-
         # IDs of compound glyphs.
         attr_reader :glyph_ids
 
@@ -89,9 +88,9 @@ def initialize(id, raw)
           io = StringIO.new(raw)
 
           @number_of_contours, @x_min, @y_min, @x_max, @y_max =
-            io.read(10).unpack('n*').map do |i|
+            io.read(10).unpack('n*').map { |i|
               BinUtils.twos_comp_to_int(i, bit_width: 16)
-            end
+            }
 
           # Because TTFunk only cares about glyphs insofar as they (1) provide
           # a bounding box for each glyph, and (2) can be rewritten into a
@@ -109,9 +108,9 @@ def initialize(id, raw)
           loop do
             flags, glyph_id = @raw[offset, 4].unpack('n*')
             @glyph_ids << glyph_id
-            @glyph_id_offsets << offset + 2
+            @glyph_id_offsets << (offset + 2)
 
-            break unless flags & MORE_COMPONENTS != 0
+            break if (flags & MORE_COMPONENTS).zero?
 
             offset += 4
 
diff --git a/lib/ttfunk/table/glyf/simple.rb b/lib/ttfunk/table/glyf/simple.rb
index 0280d92e..52db3c0b 100644
--- a/lib/ttfunk/table/glyf/simple.rb
+++ b/lib/ttfunk/table/glyf/simple.rb
@@ -55,9 +55,9 @@ def initialize(id, raw)
           io = StringIO.new(raw)
 
           @number_of_contours, @x_min, @y_min, @x_max, @y_max =
-            io.read(10).unpack('n*').map do |i|
+            io.read(10).unpack('n*').map { |i|
               BinUtils.twos_comp_to_int(i, bit_width: 16)
-            end
+            }
 
           @end_points_of_contours = io.read(number_of_contours * 2).unpack('n*')
           @instruction_length = io.read(2).unpack1('n')
diff --git a/lib/ttfunk/table/head.rb b/lib/ttfunk/table/head.rb
index 7f070a43..8b7cd42c 100644
--- a/lib/ttfunk/table/head.rb
+++ b/lib/ttfunk/table/head.rb
@@ -100,7 +100,7 @@ def encode(head, loca, mapping)
                 head.created, head.modified,
                 *min_max_values_for(head, mapping),
                 head.mac_style, head.lowest_rec_ppem, head.font_direction_hint,
-                loca[:type] || 0, head.glyph_data_format
+                loca[:type] || 0, head.glyph_data_format,
               ].pack('Nn2q>2n*')
           end
         end
@@ -116,7 +116,7 @@ def from_long_date_time(ldt)
         # @param time [Time]
         # @return [Integer]
         def to_long_date_time(time)
-          time.to_i - LONG_DATE_TIME_BASIS
+          Integer(time) - LONG_DATE_TIME_BASIS
         end
 
         private
@@ -127,7 +127,7 @@ def min_max_values_for(head, mapping)
           y_min = Min.new
           y_max = Max.new
 
-          mapping.each do |_, old_glyph_id|
+          mapping.each_value do |old_glyph_id|
             glyph = head.file.find_glyph(old_glyph_id)
             next unless glyph
 
@@ -139,7 +139,7 @@ def min_max_values_for(head, mapping)
 
           [
             x_min.value_or(0), y_min.value_or(0),
-            x_max.value_or(0), y_max.value_or(0)
+            x_max.value_or(0), y_max.value_or(0),
           ]
         end
       end
diff --git a/lib/ttfunk/table/hhea.rb b/lib/ttfunk/table/hhea.rb
index 9e23db76..63109efe 100644
--- a/lib/ttfunk/table/hhea.rb
+++ b/lib/ttfunk/table/hhea.rb
@@ -89,7 +89,7 @@ def encode(hhea, hmtx, original, mapping)
               hhea.ascent, hhea.descent, hhea.line_gap,
               *min_max_values_for(original, mapping),
               hhea.caret_slope_rise, hhea.caret_slope_run, hhea.caret_offset,
-              0, 0, 0, 0, hhea.metric_data_format, hmtx[:number_of_metrics]
+              0, 0, 0, 0, hhea.metric_data_format, hmtx[:number_of_metrics],
             ].pack('n*')
           end
         end
@@ -102,7 +102,7 @@ def min_max_values_for(original, mapping)
           max_aw = Max.new
           max_extent = Max.new
 
-          mapping.each do |_, old_glyph_id|
+          mapping.each_value do |old_glyph_id|
             horiz_metrics = original.horizontal_metrics.for(old_glyph_id)
             next unless horiz_metrics
 
@@ -114,15 +114,14 @@ def min_max_values_for(original, mapping)
 
             x_delta = glyph.x_max - glyph.x_min
 
-            min_rsb << horiz_metrics.advance_width -
-              horiz_metrics.left_side_bearing - x_delta
+            min_rsb << (horiz_metrics.advance_width - horiz_metrics.left_side_bearing - x_delta)
 
-            max_extent << horiz_metrics.left_side_bearing + x_delta
+            max_extent << (horiz_metrics.left_side_bearing + x_delta)
           end
 
           [
             max_aw.value_or(0), min_lsb.value_or(0),
-            min_rsb.value_or(0), max_extent.value_or(0)
+            min_rsb.value_or(0), max_extent.value_or(0),
           ]
         end
       end
diff --git a/lib/ttfunk/table/hmtx.rb b/lib/ttfunk/table/hmtx.rb
index 73319360..e3087871 100644
--- a/lib/ttfunk/table/hmtx.rb
+++ b/lib/ttfunk/table/hmtx.rb
@@ -28,14 +28,14 @@ class Hmtx < Table
       #   * `:table` - encoded table.
       def self.encode(hmtx, mapping)
         metrics =
-          mapping.keys.sort.map do |new_id|
+          mapping.keys.sort.map { |new_id|
             metric = hmtx.for(mapping[new_id])
             [metric.advance_width, metric.left_side_bearing]
-          end
+          }
 
         {
           number_of_metrics: metrics.length,
-          table: metrics.flatten.pack('n*')
+          table: metrics.flatten.pack('n*'),
         }
       end
 
@@ -56,7 +56,7 @@ def for(glyph_id)
           metrics_cache[glyph_id] ||=
             HorizontalMetric.new(
               @metrics.last.advance_width,
-              @left_side_bearings[glyph_id - @metrics.length]
+              @left_side_bearings[glyph_id - @metrics.length],
             )
       end
 
@@ -72,7 +72,7 @@ def parse!
         file.horizontal_header.number_of_metrics.times do
           advance = read(2, 'n').first
           lsb = read_signed(1).first
-          @metrics.push HorizontalMetric.new(advance, lsb)
+          @metrics.push(HorizontalMetric.new(advance, lsb))
         end
 
         lsb_count = file.maximum_profile.num_glyphs -
diff --git a/lib/ttfunk/table/kern.rb b/lib/ttfunk/table/kern.rb
index b47016de..676cdad2 100644
--- a/lib/ttfunk/table/kern.rb
+++ b/lib/ttfunk/table/kern.rb
@@ -23,7 +23,7 @@ class Kern < Table
       def self.encode(kerning, mapping)
         return unless kerning.exists? && kerning.tables.any?
 
-        tables = kerning.tables.map { |table| table.recode(mapping) }.compact
+        tables = kerning.tables.filter_map { |table| table.recode(mapping) }
         return if tables.empty?
 
         [0, tables.length, tables.join].pack('nnA*')
@@ -68,7 +68,7 @@ def parse_version_0_tables(_num_tables)
           vertical: (coverage & 0x1).zero?,
           minimum: (coverage & 0x2 != 0),
           cross: (coverage & 0x4 != 0),
-          override: (coverage & 0x8 != 0)
+          override: (coverage & 0x8 != 0),
         )
       end
 
@@ -85,7 +85,7 @@ def parse_version_1_tables(num_tables)
             data: io.read(length - 8),
             vertical: (coverage & 0x8000 != 0),
             cross: (coverage & 0x4000 != 0),
-            variation: (coverage & 0x2000 != 0)
+            variation: (coverage & 0x2000 != 0),
           )
         end
       end
diff --git a/lib/ttfunk/table/kern/format0.rb b/lib/ttfunk/table/kern/format0.rb
index 1c12af1b..591c020f 100644
--- a/lib/ttfunk/table/kern/format0.rb
+++ b/lib/ttfunk/table/kern/format0.rb
@@ -26,11 +26,11 @@ def initialize(attributes = {})
           @pairs = {}
           num_pairs.times do |i|
             # sanity check, in case there's a bad length somewhere
-            break if i * 3 + 2 > pairs.length
+            break if (i * 3) + 2 > pairs.length
 
             left = pairs[i * 3]
-            right = pairs[i * 3 + 1]
-            value = to_signed(pairs[i * 3 + 2])
+            right = pairs[(i * 3) + 1]
+            value = to_signed(pairs[(i * 3) + 2])
             @pairs[[left, right]] = value
           end
         end
@@ -69,19 +69,19 @@ def recode(mapping)
           return if subset.empty?
 
           num_pairs = subset.length
-          search_range = 2 * 2**(Math.log(num_pairs) / Math.log(2)).to_i
-          entry_selector = (Math.log(search_range / 2) / Math.log(2)).to_i
+          search_range = 2 * (2**Integer(Math.log(num_pairs) / Math.log(2)))
+          entry_selector = Integer(Math.log(search_range / 2) / Math.log(2))
           range_shift = (2 * num_pairs) - search_range
 
           [
             attributes[:version],
-            num_pairs * 6 + 14,
+            (num_pairs * 6) + 14,
             attributes[:coverage],
             num_pairs,
             search_range,
             entry_selector,
             range_shift,
-            subset
+            subset,
           ].flatten.pack('n*')
         end
       end
diff --git a/lib/ttfunk/table/loca.rb b/lib/ttfunk/table/loca.rb
index 4447c0e7..1e74cb5b 100644
--- a/lib/ttfunk/table/loca.rb
+++ b/lib/ttfunk/table/loca.rb
@@ -21,10 +21,10 @@ class Loca < Table
       #   * `:table` - encoded bytes
       def self.encode(offsets)
         long_offsets =
-          offsets.any? do |offset|
+          offsets.any? { |offset|
             short_offset = offset / 2
             short_offset * 2 != offset || short_offset > 0xffff
-          end
+          }
 
         if long_offsets
           { type: 1, table: offsets.pack('N*') }
diff --git a/lib/ttfunk/table/maxp.rb b/lib/ttfunk/table/maxp.rb
index 8cc7c129..f58e5d3f 100644
--- a/lib/ttfunk/table/maxp.rb
+++ b/lib/ttfunk/table/maxp.rb
@@ -89,9 +89,7 @@ def encode(maxp, new2old_glyph)
             table << [maxp.version, num_glyphs].pack('Nn')
 
             if maxp.version == 0x10000
-              stats = stats_for(
-                maxp, glyphs_from_ids(maxp, new2old_glyph.values)
-              )
+              stats = stats_for(maxp, glyphs_from_ids(maxp, new2old_glyph.values))
 
               table << [
                 stats[:max_points],
@@ -108,7 +106,7 @@ def encode(maxp, new2old_glyph)
                 maxp.max_stack_elements,
                 stats[:max_size_of_instructions],
                 stats[:max_component_elements],
-                stats[:max_component_depth]
+                stats[:max_component_depth],
               ].pack('n*')
             end
           end
@@ -150,7 +148,7 @@ def stats_for_simple(_maxp, glyphs)
             max_component_elements: max_component_elements,
             max_points: max_points,
             max_contours: max_contours,
-            max_size_of_instructions: max_size_of_instructions
+            max_size_of_instructions: max_size_of_instructions,
           }
         end
 
@@ -171,7 +169,7 @@ def stats_for_compound(maxp, glyphs)
           {
             max_component_points: max_component_points,
             max_component_depth: max_component_depth,
-            max_component_contours: max_component_contours
+            max_component_contours: max_component_contours,
           }
         end
 
@@ -182,9 +180,7 @@ def totals_for_compound(maxp, glyphs, depth)
 
           glyphs.each do |glyph|
             if glyph.compound?
-              stats = totals_for_compound(
-                maxp, glyphs_from_ids(maxp, glyph.glyph_ids), depth + 1
-              )
+              stats = totals_for_compound(maxp, glyphs_from_ids(maxp, glyph.glyph_ids), depth + 1)
 
               total_points << stats[:total_points]
               total_contours << stats[:total_contours]
@@ -199,7 +195,7 @@ def totals_for_compound(maxp, glyphs, depth)
           {
             total_points: total_points,
             total_contours: total_contours,
-            max_depth: max_depth
+            max_depth: max_depth,
           }
         end
       end
diff --git a/lib/ttfunk/table/name.rb b/lib/ttfunk/table/name.rb
index 4740f6be..6f876d7d 100644
--- a/lib/ttfunk/table/name.rb
+++ b/lib/ttfunk/table/name.rb
@@ -7,7 +7,6 @@ module TTFunk
   class Table
     # Naming (`name`) table
     class Name < Table
-
       # Name Record.
       class NameString < ::String
         # Platform ID.
@@ -188,15 +187,13 @@ def strip_extended
       def self.encode(names, key = '')
         tag = Digest::SHA1.hexdigest(key)[0, 6]
 
-        postscript_name = NameString.new(
-          "#{tag}+#{names.postscript_name}", 1, 0, 0
-        )
+        postscript_name = NameString.new("#{tag}+#{names.postscript_name}", 1, 0, 0)
 
         strings = names.strings.dup
         strings[6] = [postscript_name]
         str_count = strings.reduce(0) { |sum, (_, list)| sum + list.length }
 
-        table = [0, str_count, 6 + 12 * str_count].pack('n*')
+        table = [0, str_count, 6 + (12 * str_count)].pack('n*')
         strtable = +''
 
         items = []
@@ -206,13 +203,13 @@ def self.encode(names, key = '')
           end
         end
         items =
-          items.sort_by do |id, string|
+          items.sort_by { |id, string|
             [string.platform_id, string.encoding_id, string.language_id, id]
-          end
+          }
         items.each do |id, string|
           table << [
             string.platform_id, string.encoding_id, string.language_id, id,
-            string.length, strtable.length
+            string.length, strtable.length,
           ].pack('n*')
           strtable << string
         end
@@ -244,7 +241,7 @@ def parse!
             name_id: id,
             length: length,
             offset: offset + string_offset + start_offset,
-            text: nil
+            text: nil,
           }
         end
 
@@ -257,7 +254,7 @@ def parse!
             @entries[i][:text] || '',
             @entries[i][:platform_id],
             @entries[i][:encoding_id],
-            @entries[i][:language_id]
+            @entries[i][:language_id],
           )
         end
 
diff --git a/lib/ttfunk/table/os2.rb b/lib/ttfunk/table/os2.rb
index 38070937..1988eed0 100644
--- a/lib/ttfunk/table/os2.rb
+++ b/lib/ttfunk/table/os2.rb
@@ -178,7 +178,7 @@ class OS2 < Table
         737 => 60,
         708 => 61,
         850 => 62,
-        437 => 63
+        437 => 63,
       }.freeze
 
       # Unicode blocks.
@@ -351,7 +351,7 @@ class OS2 < Table
         (0x10280..0x1029F) => 121,
         (0x10920..0x1093F) => 121,
         (0x1F030..0x1F09F) => 122,
-        (0x1F000..0x1F02F) => 122
+        (0x1F000..0x1F02F) => 122,
       }.freeze
 
       # Indicates that font supports supplementary characters.
@@ -371,10 +371,9 @@ class OS2 < Table
 
       # Space character code point.
       CODEPOINT_SPACE = 32
-      SPACE_GLYPH_MISSING_ERROR = "Space glyph (0x#{CODEPOINT_SPACE.to_s(16)})"\
-        ' must be included in the font'
 
       # Error message for missing space character.
+      SPACE_GLYPH_MISSING_ERROR = "Space glyph (0x#{CODEPOINT_SPACE.to_s(16)}) must be included in the font"
 
       # Used to calculate the xAvgCharWidth field.
       # From https://docs.microsoft.com/en-us/typography/opentype/spec/os2:
@@ -393,7 +392,7 @@ class OS2 < Table
       # chracter weights for average character width calculation.
       WEIGHT_LOWERCASE = [
         64, 14, 27, 35, 100, 20, 14, 42, 63, 3, 6, 35, 20,
-        56, 56, 17, 4, 49, 56, 71, 31, 10, 18, 3, 18, 2
+        56, 56, 17, 4, 49, 56, 71, 31, 10, 18, 3, 18, 2,
       ].freeze
 
       # Table tag.
@@ -405,7 +404,7 @@ def tag
       class << self
         # Encode table.
         #
-        # @param head [TTFunk::Table::Head]
+        # @param os2 [TTFunk::Table::OS2]
         # @param subset [TTFunk::Subset::MacRoman, TTFunk::Subset::Windows1252,
         #   TTFunk::Subset::Unicode, TTFunk::Subset::Unicode8Bit]
         # @return [String]
@@ -418,7 +417,7 @@ def encode(os2, subset)
             os2.y_subscript_y_offset, os2.y_superscript_x_size,
             os2.y_superscript_y_size, os2.y_superscript_x_offset,
             os2.y_superscript_y_offset, os2.y_strikeout_size,
-            os2.y_strikeout_position, os2.family_class
+            os2.y_strikeout_position, os2.family_class,
           ].pack('n*')
 
           result << os2.panose
@@ -428,7 +427,7 @@ def encode(os2, subset)
             .slice_int(
               new_char_range.value,
               bit_width: 32,
-              slice_count: 4
+              slice_count: 4,
             )
             .pack('N*')
 
@@ -449,27 +448,27 @@ def encode(os2, subset)
           last_char_index = [code_points.last || 0, UNICODE_MAX].min
 
           result << [
-            os2.selection, first_char_index, last_char_index
+            os2.selection, first_char_index, last_char_index,
           ].pack('n*')
 
           if os2.version.positive?
             result << [
               os2.ascent, os2.descent, os2.line_gap,
-              os2.win_ascent, os2.win_descent
+              os2.win_ascent, os2.win_descent,
             ].pack('n*')
 
             result << BinUtils
               .slice_int(
                 code_pages_for(subset).value,
                 bit_width: 32,
-                slice_count: 2
+                slice_count: 2,
               )
               .pack('N*')
 
             if os2.version > 1
               result << [
                 os2.x_height, os2.cap_height, os2.default_char,
-                os2.break_char, os2.max_context
+                os2.break_char, os2.max_context,
               ].pack('n*')
             end
           end
@@ -534,7 +533,7 @@ def avg_ms_symbol_char_width_for(os2, subset)
 
           # use new -> old glyph mapping in order to include compound glyphs
           # in the calculation
-          subset.new_to_old_glyph.each do |_, old_gid|
+          subset.new_to_old_glyph.each_value do |old_gid|
             if (metric = os2.file.horizontal_metrics.for(old_gid))
               total_width += metric.advance_width
               num_glyphs += 1 if metric.advance_width.positive?
@@ -585,7 +584,7 @@ def avg_weighted_char_width_for(os2, subset)
 
           # use new -> old glyph mapping in order to include compound glyphs
           # in the calculation
-          subset.new_to_old_glyph.each do |_, old_gid|
+          subset.new_to_old_glyph.each_value do |old_gid|
             if (metric = os2.file.horizontal_metrics.for(old_gid))
               total_width += metric.advance_width
             end
@@ -610,9 +609,7 @@ def parse!
           @y_strikeout_position, @family_class = read_signed(12)
         @panose = io.read(10)
 
-        @char_range = BitField.new(
-          BinUtils.stitch_int(read(16, 'N*'), bit_width: 32)
-        )
+        @char_range = BitField.new(BinUtils.stitch_int(read(16, 'N*'), bit_width: 32))
 
         @vendor_id = io.read(4)
         @selection, @first_char_index, @last_char_index = read(6, 'n*')
@@ -620,9 +617,7 @@ def parse!
         if @version.positive?
           @ascent, @descent, @line_gap = read_signed(3)
           @win_ascent, @win_descent = read(4, 'nn')
-          @code_page_range = BitField.new(
-            BinUtils.stitch_int(read(8, 'N*'), bit_width: 32)
-          )
+          @code_page_range = BitField.new(BinUtils.stitch_int(read(8, 'N*'), bit_width: 32))
 
           if @version > 1
             @x_height, @cap_height = read_signed(2)
diff --git a/lib/ttfunk/table/post.rb b/lib/ttfunk/table/post.rb
index 32111244..950e790a 100644
--- a/lib/ttfunk/table/post.rb
+++ b/lib/ttfunk/table/post.rb
@@ -64,7 +64,7 @@ class Post < Table
       #   are old glyph IDs
       # @return [String, nil]
       def self.encode(post, mapping)
-        return unless post.exists?
+        return if post.nil?
 
         post.recode(mapping)
       end
@@ -106,7 +106,7 @@ def recode(mapping)
           if position
             index << position
           else
-            index << 257 + strings.length
+            index << (257 + strings.length)
             strings << post_glyph
           end
         end
@@ -145,11 +145,7 @@ def parse!
       end
 
       def parse_format!
-        warn(
-          Kernel.format(
-            'postscript table format 0x%08X is not supported', @format
-          )
-        )
+        warn(Kernel.format('postscript table format 0x%08X is not supported', @format))
       end
     end
   end
diff --git a/lib/ttfunk/table/sbix.rb b/lib/ttfunk/table/sbix.rb
index d6f29ff2..952aa303 100644
--- a/lib/ttfunk/table/sbix.rb
+++ b/lib/ttfunk/table/sbix.rb
@@ -56,13 +56,11 @@ def bitmap_data_for(glyph_id, strike_index)
         if glyph_offset && next_glyph_offset
           bytes = next_glyph_offset - glyph_offset
           if bytes.positive?
-            parse_from(offset + strike[:offset] + glyph_offset) do
+            parse_from(offset + strike[:offset] + glyph_offset) {
               x, y, type = read(8, 's2A4')
               data = StringIO.new(io.read(bytes - 8))
-              BitmapData.new(
-                x, y, type, data, strike[:ppem], strike[:resolution]
-              )
-            end
+              BitmapData.new(x, y, type, data, strike[:ppem], strike[:resolution])
+            }
           end
         end
       end
@@ -72,9 +70,9 @@ def bitmap_data_for(glyph_id, strike_index)
       # @param glyph_id [Integer]
       # @return [Array<BitmapData>]
       def all_bitmap_data_for(glyph_id)
-        strikes.each_index.map do |strike_index|
+        strikes.each_index.filter_map { |strike_index|
           bitmap_data_for(glyph_id, strike_index)
-        end.compact
+        }
       end
 
       private
@@ -84,21 +82,21 @@ def parse!
         strike_offsets = Array.new(num_strikes) { read(4, 'N').first }
 
         @strikes =
-          strike_offsets.map do |strike_offset|
-            parse_from(offset + strike_offset) do
+          strike_offsets.map { |strike_offset|
+            parse_from(offset + strike_offset) {
               ppem, resolution = read(4, 'n2')
               data_offsets =
-                Array.new(file.maximum_profile.num_glyphs + 1) do
+                Array.new(file.maximum_profile.num_glyphs + 1) {
                   read(4, 'N').first
-                end
+                }
               {
                 ppem: ppem,
                 resolution: resolution,
                 offset: strike_offset,
-                glyph_data_offset: data_offsets
+                glyph_data_offset: data_offsets,
               }
-            end
-          end
+            }
+          }
       end
     end
   end
diff --git a/lib/ttfunk/table/vorg.rb b/lib/ttfunk/table/vorg.rb
index ab9b61be..808f5461 100644
--- a/lib/ttfunk/table/vorg.rb
+++ b/lib/ttfunk/table/vorg.rb
@@ -34,7 +34,7 @@ def self.encode(vorg)
         ''.b.tap do |table|
           table << [
             vorg.major_version, vorg.minor_version,
-            vorg.default_vert_origin_y, vorg.count
+            vorg.default_vert_origin_y, vorg.count,
           ].pack('n*')
 
           vorg.origins.each_pair do |glyph_id, vert_origin_y|
diff --git a/lib/ttfunk/ttf_encoder.rb b/lib/ttfunk/ttf_encoder.rb
index 2fe4c223..6203a15b 100644
--- a/lib/ttfunk/ttf_encoder.rb
+++ b/lib/ttfunk/ttf_encoder.rb
@@ -7,7 +7,7 @@ class TTFEncoder
     OPTIMAL_TABLE_ORDER = [
       'head', 'hhea', 'maxp', 'OS/2', 'hmtx', 'LTSH', 'VDMX',
       'hdmx', 'cmap', 'fpgm', 'prep', 'cvt ', 'loca', 'glyf',
-      'kern', 'name', 'post', 'gasp', 'PCLT'
+      'kern', 'name', 'post', 'gasp', 'PCLT',
     ].freeze
 
     # Original font.
@@ -38,9 +38,9 @@ def initialize(original, subset, options = {})
     # @return [String]
     def encode
       # https://www.microsoft.com/typography/otspec/otff.htm#offsetTable
-      search_range = 2**Math.log2(tables.length).floor * 16
-      entry_selector = Math.log2(2**Math.log2(tables.length).floor).to_i
-      range_shift = tables.length * 16 - search_range
+      search_range = (2**Math.log2(tables.length).floor) * 16
+      entry_selector = Integer(Math.log2(2**Math.log2(tables.length).floor))
+      range_shift = (tables.length * 16) - search_range
       range_shift = 0 if range_shift.negative?
 
       newfont = EncodedString.new
@@ -50,7 +50,7 @@ def encode
         tables.length,
         search_range,
         entry_selector,
-        range_shift
+        range_shift,
       ].pack('Nn*')
 
       # Tables are supposed to be listed in ascending order whereas there is a
@@ -91,51 +91,35 @@ def cmap_table
     end
 
     def glyf_table
-      @glyf_table ||= TTFunk::Table::Glyf.encode(
-        glyphs, new_to_old_glyph, old_to_new_glyph
-      )
+      @glyf_table ||= TTFunk::Table::Glyf.encode(glyphs, new_to_old_glyph, old_to_new_glyph)
     end
 
     def loca_table
-      @loca_table ||= TTFunk::Table::Loca.encode(
-        glyf_table[:offsets]
-      )
+      @loca_table ||= TTFunk::Table::Loca.encode(glyf_table[:offsets])
     end
 
     def hmtx_table
-      @hmtx_table ||= TTFunk::Table::Hmtx.encode(
-        original.horizontal_metrics, new_to_old_glyph
-      )
+      @hmtx_table ||= TTFunk::Table::Hmtx.encode(original.horizontal_metrics, new_to_old_glyph)
     end
 
     def hhea_table
-      @hhea_table = TTFunk::Table::Hhea.encode(
-        original.horizontal_header, hmtx_table, original, new_to_old_glyph
-      )
+      @hhea_table = TTFunk::Table::Hhea.encode(original.horizontal_header, hmtx_table, original, new_to_old_glyph)
     end
 
     def maxp_table
-      @maxp_table ||= TTFunk::Table::Maxp.encode(
-        original.maximum_profile, old_to_new_glyph
-      )
+      @maxp_table ||= TTFunk::Table::Maxp.encode(original.maximum_profile, old_to_new_glyph)
     end
 
     def post_table
-      @post_table ||= TTFunk::Table::Post.encode(
-        original.postscript, new_to_old_glyph
-      )
+      @post_table ||= TTFunk::Table::Post.encode(original.postscript, new_to_old_glyph)
     end
 
     def name_table
-      @name_table ||= TTFunk::Table::Name.encode(
-        original.name, glyf_table.fetch(:table, '')
-      )
+      @name_table ||= TTFunk::Table::Name.encode(original.name, glyf_table.fetch(:table, ''))
     end
 
     def head_table
-      @head_table ||= TTFunk::Table::Head.encode(
-        original.header, loca_table, new_to_old_glyph
-      )
+      @head_table ||= TTFunk::Table::Head.encode(original.header, loca_table, new_to_old_glyph)
     end
 
     # "optional" tables. Fonts may omit these if they do not need them.
@@ -169,22 +153,16 @@ def kern_table
       # generated subfont may need a kerning table... in that case, you need
       # to opt into it.
       if options[:kerning]
-        @kern_table ||= TTFunk::Table::Kern.encode(
-          original.kerning, old_to_new_glyph
-        )
+        @kern_table ||= TTFunk::Table::Kern.encode(original.kerning, old_to_new_glyph)
       end
     end
 
     def vorg_table
-      @vorg_table ||= TTFunk::Table::Vorg.encode(
-        original.vertical_origins
-      )
+      @vorg_table ||= TTFunk::Table::Vorg.encode(original.vertical_origins)
     end
 
     def dsig_table
-      @dsig_table ||= TTFunk::Table::Dsig.encode(
-        original.digital_signature
-      )
+      @dsig_table ||= TTFunk::Table::Dsig.encode(original.digital_signature)
     end
 
     def tables
@@ -205,7 +183,7 @@ def tables
         'cvt ' => cvt_table,
         'VORG' => vorg_table,
         'DSIG' => dsig_table,
-        'gasp' => gasp_table
+        'gasp' => gasp_table,
       }.compact
     end
 
@@ -231,7 +209,7 @@ def raw(data)
 
     def align(data, width)
       if (data.length % width).positive?
-        data + "\0" * (width - data.length % width)
+        data + ("\0" * (width - (data.length % width)))
       else
         data
       end
diff --git a/spec/integration/subset_spec.rb b/spec/integration/subset_spec.rb
index 79a33d45..e4f223b0 100644
--- a/spec/integration/subset_spec.rb
+++ b/spec/integration/subset_spec.rb
@@ -4,159 +4,157 @@
 require 'stringio'
 require 'ttfunk/subset'
 
-describe TTFunk do
-  describe 'subsetting' do
-    let(:space_char) { TTFunk::Subset::Unicode::SPACE_CHAR }
+describe 'subsetting' do # rubocop: disable RSpec/DescribeClass
+  let(:space_char) { TTFunk::Subset::Unicode::SPACE_CHAR }
 
-    it 'consistently names font for same subsets' do
-      font = TTFunk::File.open test_font('DejaVuSans')
+  it 'consistently names font for same subsets' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
 
-      subset1 = TTFunk::Subset.for(font, :unicode)
-      subset1.use(97)
-      name1 = TTFunk::File.new(subset1.encode).name.strings[6]
+    subset1 = TTFunk::Subset.for(font, :unicode)
+    subset1.use(97)
+    name1 = TTFunk::File.new(subset1.encode).name.strings[6]
 
-      subset2 = TTFunk::Subset.for(font, :unicode)
-      subset2.use(97)
-      name2 = TTFunk::File.new(subset2.encode).name.strings[6]
+    subset2 = TTFunk::Subset.for(font, :unicode)
+    subset2.use(97)
+    name2 = TTFunk::File.new(subset2.encode).name.strings[6]
 
-      expect(name1).to eq name2
-    end
-
-    it 'can reconstruct an entire font' do
-      font = TTFunk::File.open test_font('DejaVuSans')
-      subset = TTFunk::Subset.for(font, :unicode)
+    expect(name1).to eq name2
+  end
 
-      font.cmap.unicode.first.code_map.each do |code_point, _gid|
-        subset.use(code_point)
-      end
+  it 'can reconstruct an entire font' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
+    subset = TTFunk::Subset.for(font, :unicode)
 
-      expect { subset.encode }.to_not raise_error
+    font.cmap.unicode.first.code_map.each_key do |code_point|
+      subset.use(code_point)
     end
 
-    it 'always includes the space glyph' do
-      font = TTFunk::File.open test_font('DejaVuSans')
-      subset = TTFunk::Subset.for(font, :unicode)
-      new_font = TTFunk::File.new(subset.encode)
+    expect { subset.encode }.to_not raise_error
+  end
 
-      # space should be GID 1 since it's the only glyph in the font
-      # (0 is always .notdef)
-      expect(new_font.cmap.unicode.first[space_char]).to eq(1)
-    end
+  it 'always includes the space glyph' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
+    subset = TTFunk::Subset.for(font, :unicode)
+    new_font = TTFunk::File.new(subset.encode)
 
-    it "explodes if the space glyph isn't included" do
-      font = TTFunk::File.open test_font('DejaVuSans')
-      subset = TTFunk::Subset.for(font, :unicode)
-      subset.instance_variable_get(:@subset).delete(space_char)
-      expect { subset.encode }.to raise_error(/Space glyph .* must be included/)
-    end
+    # space should be GID 1 since it's the only glyph in the font
+    # (0 is always .notdef)
+    expect(new_font.cmap.unicode.first[space_char]).to eq(1)
+  end
 
-    it 'changes font names for different subsets' do
-      font = TTFunk::File.open test_font('DejaVuSans')
+  it "explodes if the space glyph isn't included" do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
+    subset = TTFunk::Subset.for(font, :unicode)
+    subset.instance_variable_get(:@subset).delete(space_char)
+    expect { subset.encode }.to raise_error(/Space glyph .* must be included/)
+  end
 
-      subset1 = TTFunk::Subset.for(font, :unicode)
-      subset1.use(97)
-      name1 = TTFunk::File.new(subset1.encode).name.strings[6]
+  it 'changes font names for different subsets' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
 
-      subset2 = TTFunk::Subset.for(font, :unicode)
-      subset2.use(97)
-      subset2.use(98)
-      name2 = TTFunk::File.new(subset2.encode).name.strings[6]
+    subset1 = TTFunk::Subset.for(font, :unicode)
+    subset1.use(97)
+    name1 = TTFunk::File.new(subset1.encode).name.strings[6]
 
-      expect(name1).to_not eq name2
-    end
+    subset2 = TTFunk::Subset.for(font, :unicode)
+    subset2.use(97)
+    subset2.use(98)
+    name2 = TTFunk::File.new(subset2.encode).name.strings[6]
 
-    it 'calculates checksum correctly for empty table data' do
-      font = TTFunk::File.open test_font('Mplus1p')
-      subset1 = TTFunk::Subset.for(font, :unicode)
-      expect { subset1.encode }.to_not raise_error
-    end
+    expect(name1).to_not eq name2
+  end
 
-    it 'generates font directory with tables in ascending order' do
-      font = TTFunk::File.open test_font('DejaVuSans')
+  it 'calculates checksum correctly for empty table data' do
+    font = TTFunk::File.open(test_font('Mplus1p'))
+    subset1 = TTFunk::Subset.for(font, :unicode)
+    expect { subset1.encode }.to_not raise_error
+  end
 
-      subset = TTFunk::Subset.for(font, :unicode)
-      subset.use(97)
+  it 'generates font directory with tables in ascending order' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
 
-      directory = TTFunk::File.new(subset.encode).directory
-      table_tags = directory.tables.keys
+    subset = TTFunk::Subset.for(font, :unicode)
+    subset.use(97)
 
-      expect(table_tags.sort).to eq(table_tags)
-      expect(table_tags.first).to be < table_tags.last
-    end
+    directory = TTFunk::File.new(subset.encode).directory
+    table_tags = directory.tables.keys
+
+    expect(table_tags.sort).to eq(table_tags)
+    expect(table_tags.first).to be < table_tags.last
+  end
 
-    it 'calculates search_range, entry_selector & range_shift values' do
-      font = TTFunk::File.open test_font('DejaVuSans')
+  it 'calculates search_range, entry_selector & range_shift values' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
+
+    subset = TTFunk::Subset.for(font, :unicode)
+    subset.use(97)
+    subset_io = StringIO.new(subset.encode)
+
+    scaler_type, table_count = subset_io.read(6).unpack('Nn')
+    search_range, entry_selector, range_shift =
+      subset_io.read(6).unpack('nnn')
+
+    # Subset fonts include 14 tables by default.
+    expected_table_count = 14
+    # Smallest power of two less than number of tables, times 16.
+    expected_search_range = 8 * 16
+    # Log2 of max power of two smaller than number of tables.
+    expected_entry_selector = 3
+    # Range shift is defined as 16*table_count - search_range.
+    expected_range_shift = (16 * expected_table_count) - expected_search_range
+
+    expect(scaler_type).to eq(font.directory.scaler_type)
+    expect(table_count).to eq(expected_table_count)
+    expect(search_range).to eq(expected_search_range)
+    expect(entry_selector).to eq(expected_entry_selector)
+    expect(range_shift).to eq(expected_range_shift)
+  end
+
+  it 'knows which characters it includes' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
+    unicode = TTFunk::Subset.for(font, :unicode)
+    unicode_8bit = TTFunk::Subset.for(font, :unicode_8bit)
+    mac_roman = TTFunk::Subset.for(font, :mac_roman)
+    windows1252 = TTFunk::Subset.for(font, :windows_1252) # rubocop: disable Naming/VariableNumber
 
-      subset = TTFunk::Subset.for(font, :unicode)
+    [unicode, unicode_8bit, mac_roman, windows1252].each do |subset|
+      expect(subset).to_not be_includes(97)
       subset.use(97)
-      subset_io = StringIO.new(subset.encode)
-
-      scaler_type, table_count = subset_io.read(6).unpack('Nn')
-      search_range, entry_selector, range_shift =
-        subset_io.read(6).unpack('nnn')
-
-      # Subset fonts include 14 tables by default.
-      expected_table_count = 14
-      # Smallest power of two less than number of tables, times 16.
-      expected_search_range = 8 * 16
-      # Log2 of max power of two smaller than number of tables.
-      expected_entry_selector = 3
-      # Range shift is defined as 16*table_count - search_range.
-      expected_range_shift = 16 * expected_table_count - expected_search_range
-
-      expect(scaler_type).to eq(font.directory.scaler_type)
-      expect(table_count).to eq(expected_table_count)
-      expect(search_range).to eq(expected_search_range)
-      expect(entry_selector).to eq(expected_entry_selector)
-      expect(range_shift).to eq(expected_range_shift)
+      expect(subset).to be_includes(97)
     end
+  end
 
-    it 'knows which characters it includes' do
-      font = TTFunk::File.open test_font('DejaVuSans')
-      unicode = TTFunk::Subset.for(font, :unicode)
-      unicode_8bit = TTFunk::Subset.for(font, :unicode_8bit)
-      mac_roman = TTFunk::Subset.for(font, :mac_roman)
-      windows1252 = TTFunk::Subset.for(font, :windows_1252) # rubocop: disable Naming/VariableNumber
-
-      [unicode, unicode_8bit, mac_roman, windows1252].each do |subset|
-        expect(subset).to_not be_includes(97)
-        subset.use(97)
-        expect(subset).to be_includes(97)
-      end
-    end
+  it 'maps final code 0xFFFF to glyph 0 in generated type 4 cmap' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
 
-    it 'maps final code 0xFFFF to glyph 0 in generated type 4 cmap' do
-      font = TTFunk::File.open test_font('DejaVuSans')
+    subset = TTFunk::Subset.for(font, :unicode)
+    subset.use(97)
+    cmap = TTFunk::File.new(subset.encode).cmap
 
-      subset = TTFunk::Subset.for(font, :unicode)
-      subset.use(97)
-      cmap = TTFunk::File.new(subset.encode).cmap
+    # Unicode subsets only contain a single format 4 cmap subtable.
+    expect(cmap.tables.size).to eq(1)
+    format04 = cmap.tables.first
+    expect(format04.format).to eq(4)
+    expect(format04.code_map[0xFFFF]).to eq(0)
+  end
 
-      # Unicode subsets only contain a single format 4 cmap subtable.
-      expect(cmap.tables.size).to eq(1)
-      format04 = cmap.tables.first
-      expect(format04.format).to eq(4)
-      expect(format04.code_map[0xFFFF]).to eq(0)
+  it 'sorts records in the name table correctly' do
+    font = TTFunk::File.open(test_font('DejaVuSans'))
+
+    subset = TTFunk::Subset.for(font, :unicode)
+    subset.use(97)
+    name = TTFunk::File.new(subset.encode).name
+
+    records = []
+    name.entries.each do |entry|
+      records << [
+        entry[:platform_id],
+        entry[:encoding_id],
+        entry[:language_id],
+        entry[:name_id],
+      ]
     end
 
-    it 'sorts records in the name table correctly' do
-      font = TTFunk::File.open test_font('DejaVuSans')
-
-      subset = TTFunk::Subset.for(font, :unicode)
-      subset.use(97)
-      name = TTFunk::File.new(subset.encode).name
-
-      records = []
-      name.entries.each do |entry|
-        records << [
-          entry[:platform_id],
-          entry[:encoding_id],
-          entry[:language_id],
-          entry[:name_id]
-        ]
-      end
-
-      expect(records).to eq(records.sort)
-    end
+    expect(records).to eq(records.sort)
   end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 7e772f77..cb1a192c 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -8,6 +8,5 @@
 Dir[File.expand_path('support/**/*.rb', __dir__)].sort.each { |f| require f }
 
 RSpec.configure do |config|
-  config.include PathHelpers
-  config.include TextHelpers
+  config.include(PathHelpers)
 end
diff --git a/spec/support/text_helpers.rb b/spec/support/text_helpers.rb
deleted file mode 100644
index 49868c1b..00000000
--- a/spec/support/text_helpers.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-# frozen_string_literal: true
-
-module TextHelpers
-  def strip_leading_spaces(str)
-    # isolate leading spaces for all lines then choose the shortest, i.e. the
-    # number of leading spaces all the lines have in common
-    min_leader_len = str.scan(/^(\s+)/).flatten.min_by(&:length).length
-
-    # remove the first min_leader_len leading spaces from each line
-    str.gsub(/^\s{#{min_leader_len}}/, '')
-  end
-end
diff --git a/spec/ttfunk/bin_utils_spec.rb b/spec/ttfunk/bin_utils_spec.rb
index 03aa5204..365e57a3 100644
--- a/spec/ttfunk/bin_utils_spec.rb
+++ b/spec/ttfunk/bin_utils_spec.rb
@@ -8,9 +8,7 @@
 
   describe '.stitch_int' do
     it 'composes an int from a series of bytes of a given width' do
-      result = described_class.stitch_int(
-        [0b01001100, 0b11010001], bit_width: bit_width
-      )
+      result = described_class.stitch_int([0b01001100, 0b11010001], bit_width: bit_width)
 
       expect(result).to eq(0b1101000101001100)
     end
@@ -18,9 +16,7 @@
 
   describe '.slice_int' do
     it 'breaks down an int into a series of segments of the given bit width' do
-      result = described_class.slice_int(
-        0b1101000101001100, bit_width: bit_width, slice_count: 2
-      )
+      result = described_class.slice_int(0b1101000101001100, bit_width: bit_width, slice_count: 2)
 
       expect(result).to eq([0b01001100, 0b11010001])
     end
@@ -28,15 +24,11 @@
 
   describe '.twos_comp_to_int' do
     it "converts a two's complement number to an integer" do
-      expect(described_class.twos_comp_to_int(0b10101001, bit_width: 8)).to(
-        eq(-0b01010111)
-      )
+      expect(described_class.twos_comp_to_int(0b10101001, bit_width: 8)).to eq(-0b01010111)
     end
 
     it "returns the original number if the number isn't negative" do
-      expect(described_class.twos_comp_to_int(0b01101001, bit_width: 8)).to(
-        eq(0b01101001)
-      )
+      expect(described_class.twos_comp_to_int(0b01101001, bit_width: 8)).to eq(0b01101001)
     end
   end
 
diff --git a/spec/ttfunk/bit_field_spec.rb b/spec/ttfunk/bit_field_spec.rb
index fb7f3336..b7787cc4 100644
--- a/spec/ttfunk/bit_field_spec.rb
+++ b/spec/ttfunk/bit_field_spec.rb
@@ -10,45 +10,39 @@
 
   describe '#on?' do
     it 'determines that the correct bits are on' do
-      expect(bit_field.on?(0)).to eq(false)
-      expect(bit_field.on?(1)).to eq(true)
-      expect(bit_field.on?(2)).to eq(true)
-      expect(bit_field.on?(3)).to eq(false)
-      expect(bit_field.on?(4)).to eq(false)
-      expect(bit_field.on?(5)).to eq(true)
-      expect(bit_field.on?(6)).to eq(false)
-      expect(bit_field.on?(7)).to eq(true)
+      expect(bit_field.on?(0)).to be false
+      expect(bit_field.on?(1)).to be true
+      expect(bit_field.on?(2)).to be true
+      expect(bit_field.on?(3)).to be false
+      expect(bit_field.on?(4)).to be false
+      expect(bit_field.on?(5)).to be true
+      expect(bit_field.on?(6)).to be false
+      expect(bit_field.on?(7)).to be true
     end
   end
 
   describe '#off?' do
     it 'determines that the correct bits are off' do
-      expect(bit_field.off?(0)).to eq(true)
-      expect(bit_field.off?(1)).to eq(false)
-      expect(bit_field.off?(2)).to eq(false)
-      expect(bit_field.off?(3)).to eq(true)
-      expect(bit_field.off?(4)).to eq(true)
-      expect(bit_field.off?(5)).to eq(false)
-      expect(bit_field.off?(6)).to eq(true)
-      expect(bit_field.off?(7)).to eq(false)
+      expect(bit_field.off?(0)).to be true
+      expect(bit_field.off?(1)).to be false
+      expect(bit_field.off?(2)).to be false
+      expect(bit_field.off?(3)).to be true
+      expect(bit_field.off?(4)).to be true
+      expect(bit_field.off?(5)).to be false
+      expect(bit_field.off?(6)).to be true
+      expect(bit_field.off?(7)).to be false
     end
   end
 
   describe '#on' do
     it 'turns the given bit on' do
-      expect { bit_field.on(3) }.to(
-        change { bit_field.on?(3) }.from(false).to(true)
-      )
+      expect { bit_field.on(3) }.to change { bit_field.on?(3) }.from(false).to(true)
     end
 
     it 'updates the value' do
-      expect { bit_field.on(0) }.to(
-        change(bit_field, :value).from(0b10100110).to(0b10100111)
-      )
+      expect { bit_field.on(0) }.to change(bit_field, :value).from(0b10100110).to(0b10100111)
 
-      expect { bit_field.on(3) }.to(
-        change(bit_field, :value).from(0b10100111).to(0b10101111)
-      )
+      expect { bit_field.on(3) }.to change(bit_field, :value).from(0b10100111).to(0b10101111)
     end
 
     it 'does not update the value if no bits were flipped' do
@@ -58,19 +52,13 @@
 
   describe '#off' do
     it 'turns the given bit off' do
-      expect { bit_field.off(5) }.to(
-        change { bit_field.off?(5) }.from(false).to(true)
-      )
+      expect { bit_field.off(5) }.to change { bit_field.off?(5) }.from(false).to(true)
     end
 
     it 'updates the value' do
-      expect { bit_field.off(1) }.to(
-        change(bit_field, :value).from(0b10100110).to(0b10100100)
-      )
+      expect { bit_field.off(1) }.to change(bit_field, :value).from(0b10100110).to(0b10100100)
 
-      expect { bit_field.off(5) }.to(
-        change(bit_field, :value).from(0b10100100).to(0b10000100)
-      )
+      expect { bit_field.off(5) }.to change(bit_field, :value).from(0b10100100).to(0b10000100)
     end
 
     it 'does not update the value if no bits were flipped' do
diff --git a/spec/integration/collection_spec.rb b/spec/ttfunk/collection_spec.rb
similarity index 79%
rename from spec/integration/collection_spec.rb
rename to spec/ttfunk/collection_spec.rb
index f75f6dbd..edea2749 100644
--- a/spec/integration/collection_spec.rb
+++ b/spec/ttfunk/collection_spec.rb
@@ -4,12 +4,12 @@
 
 describe TTFunk::Collection do
   describe '.open' do
-    it 'will not open non-TTC files' do
-      expect { described_class.open test_font('DejaVuSans') }
+    it 'does not open non-TTC files' do
+      expect { described_class.open(test_font('DejaVuSans')) }
         .to raise_error(ArgumentError)
     end
 
-    it 'will open TTC files' do
+    it 'opens TTC files' do
       success = false
 
       described_class.open(test_font('DejaVuSans', :ttc)) do |_ttc|
@@ -19,7 +19,7 @@
       expect(success).to be true
     end
 
-    it 'will open TTC files as IO' do
+    it 'opens TTC files as IO' do
       success = false
 
       io = StringIO.new(File.read(test_font('DejaVuSans', :ttc)))
@@ -30,7 +30,7 @@
       expect(success).to be true
     end
 
-    it 'will report fonts in TTC' do
+    it 'reports fonts in TTC' do
       described_class.open(test_font('DejaVuSans', :ttc)) do |ttc|
         expect(ttc.count).to eq 2
         expect(ttc[0].name.font_name.first).to eq 'DejaVu Sans'
diff --git a/spec/ttfunk/encoded_string_spec.rb b/spec/ttfunk/encoded_string_spec.rb
index 8242b23a..99b4031a 100644
--- a/spec/ttfunk/encoded_string_spec.rb
+++ b/spec/ttfunk/encoded_string_spec.rb
@@ -37,9 +37,7 @@
 
     it 'does not allow adding two placeholders with the same name' do
       encoded_string << TTFunk::Placeholder.new(:foo)
-      expect { encoded_string << TTFunk::Placeholder.new(:foo) }.to(
-        raise_error(TTFunk::DuplicatePlaceholderError)
-      )
+      expect { encoded_string << TTFunk::Placeholder.new(:foo) }.to raise_error(TTFunk::DuplicatePlaceholderError)
     end
 
     it 'adds padding bytes when adding a placeholder' do
@@ -83,9 +81,7 @@
     it "raises an error if any placeholders haven't been resolved" do
       encoded_string << 'foo'
       encoded_string << TTFunk::Placeholder.new(:name)
-      expect { encoded_string.string }.to(
-        raise_error(TTFunk::UnresolvedPlaceholderError)
-      )
+      expect { encoded_string.string }.to raise_error(TTFunk::UnresolvedPlaceholderError)
     end
   end
 
@@ -98,9 +94,7 @@
     it "raises an error if any placeholders haven't been resolved" do
       encoded_string << 'foo'
       encoded_string << TTFunk::Placeholder.new(:name)
-      expect { encoded_string.bytes }.to(
-        raise_error(TTFunk::UnresolvedPlaceholderError)
-      )
+      expect { encoded_string.bytes }.to raise_error(TTFunk::UnresolvedPlaceholderError)
     end
   end
 
diff --git a/spec/integration/file_spec.rb b/spec/ttfunk/file_spec.rb
similarity index 95%
rename from spec/integration/file_spec.rb
rename to spec/ttfunk/file_spec.rb
index 132f936f..8c560f98 100644
--- a/spec/integration/file_spec.rb
+++ b/spec/ttfunk/file_spec.rb
@@ -5,13 +5,13 @@
 describe TTFunk::File do
   describe '.open' do
     it 'opens file paths' do
-      font = described_class.open test_font('DejaVuSans')
+      font = described_class.open(test_font('DejaVuSans'))
       expect(font.contents.read(4)).to eq("\x00\x00\x00\x01")
     end
 
     it 'opens IO Objects' do
-      File.open test_font('DejaVuSans') do |io|
-        font = described_class.open io
+      File.open(test_font('DejaVuSans')) do |io|
+        font = described_class.open(io)
         expect(font.contents.read(4)).to eq("\x00\x00\x00\x01")
       end
     end
@@ -121,7 +121,7 @@
           tag: 'head',
           checksum: 0xF95F2039,
           offset: 581_036,
-          length: 54
+          length: 54,
         )
       end
 
@@ -131,7 +131,7 @@
           tag: 'hmtx',
           checksum: 0xF7E35CB8,
           offset: 581_128,
-          length: 23_712
+          length: 23_712,
         )
       end
 
@@ -141,7 +141,7 @@
           tag: 'glyf',
           checksum: 0x77CAC4E8,
           offset: 51_644,
-          length: 529_392
+          length: 529_392,
         )
       end
     end
@@ -155,7 +155,7 @@
           tag: 'CFF ',
           checksum: 0xE3109AB9,
           offset: 260_480,
-          length: 14_170_569
+          length: 14_170_569,
         )
       end
     end
diff --git a/spec/ttfunk/otf_encoder_spec.rb b/spec/ttfunk/otf_encoder_spec.rb
index 560daa5b..6f30a6c3 100644
--- a/spec/ttfunk/otf_encoder_spec.rb
+++ b/spec/ttfunk/otf_encoder_spec.rb
@@ -34,9 +34,7 @@
         new_font.directory.tables.keys
 
       tables.each_cons(2) do |first_table, second_table|
-        expect(new_font.directory.tables[first_table][:offset]).to(
-          be < new_font.directory.tables[second_table][:offset]
-        )
+        expect(new_font.directory.tables[first_table][:offset]).to be < new_font.directory.tables[second_table][:offset]
       end
     end
   end
diff --git a/spec/ttfunk/sci_form_spec.rb b/spec/ttfunk/sci_form_spec.rb
index c5d007ac..502a8882 100644
--- a/spec/ttfunk/sci_form_spec.rb
+++ b/spec/ttfunk/sci_form_spec.rb
@@ -8,7 +8,7 @@
 
   describe '#to_f' do
     it 'converts to a float' do
-      expect(sci.to_f).to eq(612_300)
+      expect(Float(sci)).to eq(612_300)
     end
   end
 end
diff --git a/spec/ttfunk/table/cff/charset_spec.rb b/spec/ttfunk/table/cff/charset_spec.rb
index 91c609e5..7879b941 100644
--- a/spec/ttfunk/table/cff/charset_spec.rb
+++ b/spec/ttfunk/table/cff/charset_spec.rb
@@ -15,9 +15,7 @@
       end
 
       it 'includes all the entries from the expert charset' do
-        expect(charset.to_a).to eq(
-          ['.notdef'] + described_class.strings_for_charset_id(charset_id)
-        )
+        expect(charset.to_a).to eq(['.notdef'] + described_class.strings_for_charset_id(charset_id))
       end
     end
 
@@ -28,25 +26,21 @@
         # From the spec: There is one less element in the glyph name array than
         # nGlyphs (i.e. charstrings count) because the .notdef glyph name is
         # omitted.
-        expect(charset.items_count).to(
-          eq(font.cff.top_index[0].charstrings_index.items_count - 1)
-        )
+        expect(charset.items_count).to eq(font.cff.top_index[0].charstrings_index.items_count - 1)
       end
 
       it 'parses the entries correctly' do
         strings = charset.to_a
 
         # these should come from the set of "standard" strings
-        expect(strings[0..6]).to eq(
-          %w[.notdef uni000D space exclam quotedbl numbersign dollar]
-        )
+        expect(strings[0..6]).to eq %w[.notdef uni000D space exclam quotedbl numbersign dollar]
 
         # these should come from the strings index
         expect(strings[-6..]).to eq(
           %w[
             endash.smcp emdash.smcp parenleft.alt parenright.alt
             parenleft.smcp parenright.smcp
-          ]
+          ],
         )
       end
     end
@@ -58,23 +52,17 @@
         # From the spec: There is one less element in the glyph name array than
         # nGlyphs (i.e. charstrings count) because the .notdef glyph name is
         # omitted.
-        expect(charset.items_count).to(
-          eq(font.cff.top_index[0].charstrings_index.items_count - 1)
-        )
+        expect(charset.items_count).to eq(font.cff.top_index[0].charstrings_index.items_count - 1)
       end
 
       it 'parses the entries correctly' do
         strings = charset.to_a
 
         # these should come from the set of "standard" strings
-        expect(strings[0..6]).to eq(
-          %w[.notdef .null CR space exclam quotedbl numbersign]
-        )
+        expect(strings[0..6]).to eq %w[.notdef .null CR space exclam quotedbl numbersign]
 
         # these should come from the strings index
-        expect(strings[-6..]).to eq(
-          %w[r_r s_s t_t w_w_w zero_seven zero_zero]
-        )
+        expect(strings[-6..]).to eq %w[r_r s_s t_t w_w_w zero_seven zero_zero]
       end
     end
 
@@ -85,18 +73,14 @@
         # From the spec: There is one less element in the glyph name array than
         # nGlyphs (i.e. charstrings count) because the .notdef glyph name is
         # omitted.
-        expect(charset.items_count).to(
-          eq(font.cff.top_index[0].charstrings_index.items_count - 1)
-        )
+        expect(charset.items_count).to eq(font.cff.top_index[0].charstrings_index.items_count - 1)
       end
 
       it 'parses the entries correctly' do
         strings = charset.to_a
 
         # these should come from the set of "standard" strings
-        expect(strings[0..6]).to eq(
-          %w[.notdef space exclam quotedbl numbersign dollar percent]
-        )
+        expect(strings[0..6]).to eq %w[.notdef space exclam quotedbl numbersign dollar percent]
 
         # These should come from the strings index. This particular font is
         # curious however in that most of the glyphs do not have a corresponding
@@ -106,9 +90,7 @@
         # font are Chinese characters which may not have useful descriptions.
         # For example, the Unicode/CLDR data for most Chinese characters simply
         # contains the description "CJK Ideograph."
-        expect(strings[-6..]).to eq(
-          [nil, nil, nil, nil, nil, nil]
-        )
+        expect(strings[-6..]).to eq [nil, nil, nil, nil, nil, nil]
       end
     end
   end
@@ -128,7 +110,7 @@
           0x29 => { old: 10, new: 10 },
           0x2d => { old: 14, new: 14 },
           0x2e => { old: 15, new: 15 },
-          0x34 => { old: 21, new: 21 }
+          0x34 => { old: 21, new: 21 },
         }
       end
 
@@ -141,8 +123,8 @@
         expect(encoded.bytes).to eq(
           [
             0x00, 0x00, 0x01, 0x00, 0x04, 0x00, 0x0A,
-            0x00, 0x0E, 0x00, 0x0F, 0x00, 0x15
-          ]
+            0x00, 0x0E, 0x00, 0x0F, 0x00, 0x15,
+          ],
         )
       end
     end
@@ -151,7 +133,7 @@
       let(:charmap) do
         # i.e. the first 20 characters, in order
         # (supposed to be new => old glyph IDs)
-        Hash[(1..20).map { |i| [0x20 + i, { old: i, new: i }] }]
+        (1..20).to_h { |i| [0x20 + i, { old: i, new: i }] }
       end
 
       it 'encodes using the 8-bit range-based format' do
@@ -168,7 +150,7 @@
       let(:charmap) do
         # we want to get a 2-byte range to demonstrate the 16-bit format
         # (supposed to be new => old glyph IDs)
-        Hash[(1..2**10).map { |i| [0x20 + i, { old: i, new: i }] }]
+        (1..(2**10)).to_h { |i| [0x20 + i, { old: i, new: i }] }
       end
 
       it 'encodes using the 16-bit range-based format' do
diff --git a/spec/ttfunk/table/cff/charstrings_index_spec.rb b/spec/ttfunk/table/cff/charstrings_index_spec.rb
index ff5ba29b..7dd35c81 100644
--- a/spec/ttfunk/table/cff/charstrings_index_spec.rb
+++ b/spec/ttfunk/table/cff/charstrings_index_spec.rb
@@ -3,7 +3,7 @@
 require 'spec_helper'
 require 'ttfunk/table/cff'
 
-RSpec.describe TTFunk::Table::Cff do
+RSpec.describe TTFunk::Table::Cff, 'Charstring Index' do # rubocop: disable RSpec/DescribeMethod
   let(:font_path) { test_font('NotoSansCJKsc-Thin', :otf) }
   let(:font) { TTFunk::File.open(font_path) }
   let(:charstrings_index) { font.cff.top_index[0].charstrings_index }
@@ -44,8 +44,8 @@
         [:curve, 869, 688, 916, 613, 938, 572],
         [:line, 967, 587],
         [:curve, 942, 629, 893, 704, 868, 737],
-        [:close]
-      ]
+        [:close],
+      ],
     )
   end
 
@@ -95,8 +95,8 @@
         [:line, -332, 176],
         [:line, -127, 176],
         [:line, -127, 206],
-        [:close]
-      ]
+        [:close],
+      ],
     )
   end
 
@@ -170,8 +170,8 @@
         [:curve, 933, 263, 941, 274, 949, 280],
         [:curve, 765, 326, 616, 387, 512, 527],
         [:curve, 518, 534, 522, 542, 527, 549],
-        [:close]
-      ]
+        [:close],
+      ],
     )
   end
 end
diff --git a/spec/ttfunk/table/cff/dict_spec.rb b/spec/ttfunk/table/cff/dict_spec.rb
index 5d558549..a3ae1642 100644
--- a/spec/ttfunk/table/cff/dict_spec.rb
+++ b/spec/ttfunk/table/cff/dict_spec.rb
@@ -19,7 +19,7 @@
 
     # negative 4-byte int, positive 4-byte int, operator 9
     [0x1D, 0xBC, 0x92, 0x6A, 0xE8, 0x1D, 0x55, 0x4F, 0x3A, 0xD4, 0x09] => {
-      9 => [-1_131_255_064, 1_431_255_764]
+      9 => [-1_131_255_064, 1_431_255_764],
     },
 
     # negative float with no exponent, operator 10
@@ -30,12 +30,12 @@
 
     # positive float with negative exponent, operator 11
     [0x1E, 0x0A, 0x14, 0x05, 0x41, 0xC3, 0xFF, 0x0B] => {
-      11 => [TTFunk::SciForm.new(0.140541, -3)]
+      11 => [TTFunk::SciForm.new(0.140541, -3)],
     },
 
     # positive float with positive exponent, operator 11
     [0x1E, 0x0A, 0x14, 0x05, 0x41, 0xB3, 0xFF, 0x0B] => {
-      11 => [TTFunk::SciForm.new(0.140541, 3)]
+      11 => [TTFunk::SciForm.new(0.140541, 3)],
     },
 
     # Float with a missing exponent, operator 1
@@ -43,12 +43,10 @@
   }
 
   test_cases.each_with_index do |(bytes, decoded_values), idx|
-    context "test case #{idx}" do
+    context "with example #{idx}" do
       subject(:dict) do
         io = StringIO.new(bytes.pack('C*'))
-        described_class.new(
-          TestFile.new(io), 0, bytes.length
-        )
+        described_class.new(TestFile.new(io), 0, bytes.length)
       end
 
       it 'parses correctly' do
@@ -68,9 +66,7 @@
     data = [0x1E, 0x0A, 0xFF, 0x05]
     file = TestFile.new(StringIO.new(data.pack('C*')))
 
-    expect { described_class.new(file, 0, data.length) }.to raise_error(
-      described_class::InvalidOperandError
-    )
+    expect { described_class.new(file, 0, data.length) }.to raise_error(described_class::InvalidOperandError)
   end
 
   it 'raises an error if too many operands are supplied' do
@@ -78,9 +74,7 @@
     data << 0x05 # operator
     file = TestFile.new(StringIO.new(data.pack('C*')))
 
-    expect { described_class.new(file, 0, data.length) }.to raise_error(
-      described_class::TooManyOperandsError
-    )
+    expect { described_class.new(file, 0, data.length) }.to raise_error(described_class::TooManyOperandsError)
   end
 
   it 'allows addition of entries' do
diff --git a/spec/ttfunk/table/cff/encoding_spec.rb b/spec/ttfunk/table/cff/encoding_spec.rb
index 710a4cd5..d1addc81 100644
--- a/spec/ttfunk/table/cff/encoding_spec.rb
+++ b/spec/ttfunk/table/cff/encoding_spec.rb
@@ -13,9 +13,7 @@
       let(:encoding_id) { described_class::STANDARD_ENCODING_ID }
 
       it 'includes all the entries from the standard encoding' do
-        expect(encoding.to_a).to eq(
-          [0] + described_class.codes_for_encoding_id(encoding_id)
-        )
+        expect(encoding.to_a).to eq([0] + described_class.codes_for_encoding_id(encoding_id))
       end
     end
 
@@ -23,9 +21,7 @@
       let(:font_path) { test_font('AlbertTextBold', :otf) }
 
       it 'parses the entries correctly' do
-        expect(encoding.to_a[0..8]).to eq(
-          [0, 26, 27, 28, 29, 30, 31, 32, 33]
-        )
+        expect(encoding.to_a[0..8]).to eq [0, 26, 27, 28, 29, 30, 31, 32, 33]
       end
     end
   end
@@ -45,7 +41,7 @@
           0x29 => { old: 10, new: 10 },
           0x2d => { old: 14, new: 14 },
           0x2e => { old: 15, new: 15 },
-          0x34 => { old: 21, new: 13 }
+          0x34 => { old: 21, new: 13 },
         }
       end
 
@@ -74,15 +70,11 @@
         # predefined encoding, but which is non-zero. Since, again, we're
         # testing in isolation, the parser needs to start at position 0. Long
         # story short: we need to zero out both values to run the test.
-        allow_any_instance_of(described_class).to(
-          receive(:offset).and_return(0)
-        )
+        allow_any_instance_of(described_class).to receive(:offset).and_return(0)
 
         allow(font.cff.top_index[0]).to receive(:cff_offset).and_return(0)
 
-        new_encoding = described_class.new(
-          font.cff.top_index[0], file, fake_offset, encoded.length
-        )
+        new_encoding = described_class.new(font.cff.top_index[0], file, fake_offset, encoded.length)
 
         expect(new_encoding.to_a).to eq([0, 0x20, 0x23, 0x29, 0x34, 0x2d, 0x2e])
       end
@@ -93,7 +85,7 @@
       let(:charmap) do
         # i.e. the first 20 characters, in order
         # (supposed to be new => old glyph IDs)
-        Hash[(1..20).map { |i| [0x20 + i, { old: i, new: i }] }]
+        (1..20).to_h { |i| [0x20 + i, { old: i, new: i }] }
       end
 
       it 'encodes using the range-based format' do
diff --git a/spec/ttfunk/table/cff/fd_selector_spec.rb b/spec/ttfunk/table/cff/fd_selector_spec.rb
index e83bde77..63b45fa5 100644
--- a/spec/ttfunk/table/cff/fd_selector_spec.rb
+++ b/spec/ttfunk/table/cff/fd_selector_spec.rb
@@ -17,14 +17,14 @@
       instance_double(
         TTFunk::Table::Cff::TopDict,
         :top_dict,
-        charstrings_index: charstrings_index
+        charstrings_index: charstrings_index,
       )
     end
     let(:charstrings_index) do
       instance_double(
         TTFunk::Table::Cff::CharstringsIndex,
         :charstrings_index,
-        items_count: entry_count
+        items_count: entry_count,
       )
     end
     let(:fd_selector) do
@@ -32,9 +32,7 @@
     end
 
     before do
-      allow(fd_selector).to(
-        receive(:charstrings_index).and_return(charstrings_index)
-      )
+      allow(fd_selector).to receive(:charstrings_index).and_return(charstrings_index)
     end
 
     it 'includes entries for all the glyphs in the font' do
@@ -49,7 +47,7 @@
       charmap = {
         0x20 => { old: 1, new: 1 },
         0x22 => { old: 3, new: 3 },
-        0x24 => { old: 5, new: 5 }
+        0x24 => { old: 5, new: 5 },
       }
       expect(fd_selector.encode(charmap)).to eq("\x00\x02\x04\x06")
     end
@@ -60,33 +58,25 @@
 
     it 'includes entries for all the glyphs in the font' do
       # the charstrings index doesn't contain an entry for the .notdef glyph
-      expect(fd_selector.items_count).to(
-        eq(font.cff.top_index[0].charstrings_index.items_count + 1)
-      )
+      expect(fd_selector.items_count).to eq(font.cff.top_index[0].charstrings_index.items_count + 1)
     end
 
     it 'parses the entries correctly' do
       fd_indices = fd_selector.to_a
 
-      expect(fd_indices[0..10]).to eq(
-        [5, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15]
-      )
+      expect(fd_indices[0..10]).to eq [5, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15]
 
-      expect(fd_indices[10..20]).to eq(
-        [15, 15, 15, 15, 15, 15, 15, 17, 17, 17, 17]
-      )
+      expect(fd_indices[10..20]).to eq [15, 15, 15, 15, 15, 15, 15, 17, 17, 17, 17]
 
-      expect(fd_indices[-10..]).to eq(
-        [5, 5, 5, 5, 5, 5, 5, 5, 5, 5]
-      )
+      expect(fd_indices[-10..]).to eq [5, 5, 5, 5, 5, 5, 5, 5, 5, 5]
     end
 
     it 'encodes correctly' do
-      charmap = Hash[(0..15).map { |i| [i, { old: i, new: i }] }]
+      charmap = (0..15).to_h { |i| [i, { old: i, new: i }] }
       result = fd_selector.encode(charmap)
       expect(result).to(
         #   fmt | count |  range 1  |  range 2  | n glyphs
-        eq("\x03\x00\x02\x00\x00\x05\x00\x01\x0F\x00\x10")
+        eq("\x03\x00\x02\x00\x00\x05\x00\x01\x0F\x00\x10"),
       )
     end
   end
diff --git a/spec/ttfunk/table/cff/font_dict_spec.rb b/spec/ttfunk/table/cff/font_dict_spec.rb
index 6a29b029..d2b0d6b0 100644
--- a/spec/ttfunk/table/cff/font_dict_spec.rb
+++ b/spec/ttfunk/table/cff/font_dict_spec.rb
@@ -37,10 +37,10 @@
         eq(
           font_dict.to_h.merge(
             described_class::OPERATORS[:private] => [
-              private_dict_length, dict_length
-            ]
-          )
-        )
+              private_dict_length, dict_length,
+            ],
+          ),
+        ),
       )
 
       expect(new_dict.private_dict.count).to eq(font_dict.private_dict.count)
diff --git a/spec/ttfunk/table/cff/index_spec.rb b/spec/ttfunk/table/cff/index_spec.rb
index 9d206bc1..ebce3fac 100644
--- a/spec/ttfunk/table/cff/index_spec.rb
+++ b/spec/ttfunk/table/cff/index_spec.rb
@@ -15,7 +15,7 @@
       # data
       0xA,
       0xB,
-      0xC
+      0xC,
     ] => [[10], [11], [12]],
 
     [
@@ -28,20 +28,18 @@
       # data
       0x11, 0x22,
       0x33, 0x44, 0x55, 0x66,
-      0x77
+      0x77,
     ] => [[17, 34], [51, 68, 85, 102], [119]],
 
-    [0x00, 0x00] => []
+    [0x00, 0x00] => [],
   }
 
   describe 'decoding' do
     test_cases.each_with_index do |(bytes, decoded_values), idx|
-      context "test case #{idx}" do
+      context "with example #{idx}" do
         subject(:index) do
           io = StringIO.new(bytes.pack('C*'))
-          described_class.new(
-            TestFile.new(io), 0, bytes.size
-          )
+          described_class.new(TestFile.new(io), 0, bytes.size)
         end
 
         it 'parses correctly' do
@@ -79,13 +77,10 @@ def encode_items(*)
         # offsets
         0x01, 0x02, 0x03, 0x04,
         # data
-        0x01, 0x02, 0x03
+        0x01, 0x02, 0x03,
       ].pack('C*')
 
-      index =
-        inc_index_class.new(
-          TestFile.new(StringIO.new(data)), 0, data.length
-        )
+      index = inc_index_class.new(TestFile.new(StringIO.new(data)), 0, data.length)
 
       expect(index.encode.string).to eq("\00\03\01\01\02\03\04\02\03\04")
     end
@@ -109,13 +104,10 @@ def encode_items(*)
         # offsets
         0x01, 0x02, 0x03, 0x04,
         # data
-        0x01, 0x02, 0x03
+        0x01, 0x02, 0x03,
       ].pack('C*')
 
-      index =
-        dup_index_class.new(
-          TestFile.new(StringIO.new(data)), 0, data.length
-        )
+      index = dup_index_class.new(TestFile.new(StringIO.new(data)), 0, data.length)
 
       expect(index.encode.string).to eq("\00\06\01\01\02\03\04\05\06\07\01\01\02\02\03\03")
     end
@@ -124,7 +116,7 @@ def encode_items(*)
       { item_size: 1, data_size: 6, offset_size: 1 },
       { item_size: 0xff, data_size: 262, offset_size: 2 },
       { item_size: 0xffff, data_size: 65_544, offset_size: 3 },
-      { item_size: 0xffffff, data_size: 16_777_226, offset_size: 4 }
+      { item_size: 0xffffff, data_size: 16_777_226, offset_size: 4 },
     ].each do |params|
       it "properly encodes offset size #{params[:offset_size]}" do
         gen_index_class =
@@ -145,10 +137,7 @@ def encode_items(*)
 
         expect(data.length).to eq params[:data_size]
 
-        index =
-          described_class.new(
-            TestFile.new(StringIO.new(data)), 0, data.length
-          )
+        index = described_class.new(TestFile.new(StringIO.new(data)), 0, data.length)
 
         expect(index.items_count).to eq 1
       end
diff --git a/spec/ttfunk/table/cff/name_index_spec.rb b/spec/ttfunk/table/cff/name_index_spec.rb
index 6ff3f97b..de7fcae8 100644
--- a/spec/ttfunk/table/cff/name_index_spec.rb
+++ b/spec/ttfunk/table/cff/name_index_spec.rb
@@ -3,7 +3,7 @@
 require 'spec_helper'
 require 'ttfunk/table/cff'
 
-RSpec.describe TTFunk::Table::Cff do
+RSpec.describe TTFunk::Table::Cff, 'Name Index' do # rubocop: disable RSpec/DescribeMethod
   let(:font_path) { test_font('NotoSansCJKsc-Thin', :otf) }
   let(:font) { TTFunk::File.open(font_path) }
   let(:name_index) { font.cff.name_index }
@@ -15,9 +15,7 @@
   describe '#encode' do
     it 'encodes the index correctly' do
       encoded = name_index.encode
-      reconstituted = described_class::Index.new(
-        TestFile.new(StringIO.new(encoded.string)), 0
-      )
+      reconstituted = described_class::Index.new(TestFile.new(StringIO.new(encoded.string)), 0)
 
       expect(reconstituted.to_a).to eq(['NotoSansCJKsc-Thin'])
     end
diff --git a/spec/ttfunk/table/cff/private_dict_spec.rb b/spec/ttfunk/table/cff/private_dict_spec.rb
index fb767a5b..224686c5 100644
--- a/spec/ttfunk/table/cff/private_dict_spec.rb
+++ b/spec/ttfunk/table/cff/private_dict_spec.rb
@@ -33,9 +33,7 @@
       # when constructing charstrings. In other words, these seemingly
       # random bytes mean something specific to the charstrings code. See
       # the subr index tests for more.
-      expect(subr_index[2].bytes).to(
-        eq([127, 171, 119, 159, 248, 122, 171, 18, 11])
-      )
+      expect(subr_index[2].bytes).to eq [127, 171, 119, 159, 248, 122, 171, 18, 11]
     end
   end
 
@@ -52,9 +50,9 @@
       expect(new_dict.to_h).to(
         eq(
           private_dict.to_h.merge(
-            described_class::OPERATORS[:subrs] => [dict_length]
-          )
-        )
+            described_class::OPERATORS[:subrs] => [dict_length],
+          ),
+        ),
       )
 
       expect(new_dict.subr_index.items_count).to eq(private_dict.subr_index.items_count)
diff --git a/spec/ttfunk/table/cff/subr_index_spec.rb b/spec/ttfunk/table/cff/subr_index_spec.rb
index c34fe374..0ced24b7 100644
--- a/spec/ttfunk/table/cff/subr_index_spec.rb
+++ b/spec/ttfunk/table/cff/subr_index_spec.rb
@@ -9,17 +9,11 @@
   let(:font_index) { font.cff.top_index[0].font_index }
 
   it 'parses subroutines correctly' do
-    expect(font_index[1].private_dict.subr_index[3].bytes).to(
-      eq([39, 10, 108, 116, 37, 10, 11])
-    )
+    expect(font_index[1].private_dict.subr_index[3].bytes).to eq [39, 10, 108, 116, 37, 10, 11]
 
-    expect(font_index[15].private_dict.subr_index[6].bytes).to(
-      eq([174, 3, 34, 10, 11])
-    )
+    expect(font_index[15].private_dict.subr_index[6].bytes).to eq [174, 3, 34, 10, 11]
 
-    expect(font_index[18].private_dict.subr_index[50].bytes).to(
-      eq([179, 172, 173, 179, 180, 172, 105, 99, 11])
-    )
+    expect(font_index[18].private_dict.subr_index[50].bytes).to eq [179, 172, 173, 179, 180, 172, 105, 99, 11]
   end
 
   context 'with an index with few subroutines' do
diff --git a/spec/ttfunk/table/head_spec.rb b/spec/ttfunk/table/head_spec.rb
index 718b21ea..54750aaf 100644
--- a/spec/ttfunk/table/head_spec.rb
+++ b/spec/ttfunk/table/head_spec.rb
@@ -21,8 +21,8 @@
 
       expect(
         described_class.to_long_date_time(
-          described_class.from_long_date_time(time)
-        )
+          described_class.from_long_date_time(time),
+        ),
       ).to eq time
     end
   end
diff --git a/spec/ttfunk/table/loca_spec.rb b/spec/ttfunk/table/loca_spec.rb
index d77ff2de..bffd2071 100644
--- a/spec/ttfunk/table/loca_spec.rb
+++ b/spec/ttfunk/table/loca_spec.rb
@@ -12,7 +12,7 @@
       expect(result[:table].bytes).to eq [
         0x00, 0x00,
         0x00, 0x01,
-        0x00, 0x02
+        0x00, 0x02,
       ]
     end
 
@@ -22,7 +22,7 @@
       expect(result[:type]).to eq(0)
       expect(result[:table].bytes).to eq [
         0x00, 0x00,
-        0xFF, 0xFF
+        0xFF, 0xFF,
       ]
     end
 
@@ -33,7 +33,7 @@
       expect(result[:table].bytes).to eq [
         0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0x02,
-        0x00, 0x00, 0x00, 0x03
+        0x00, 0x00, 0x00, 0x03,
       ]
     end
 
@@ -43,7 +43,7 @@
       expect(result[:type]).to eq(1)
       expect(result[:table].bytes).to eq [
         0x00, 0x00, 0x00, 0x00,
-        0x00, 0x01, 0xFF, 0xFF
+        0x00, 0x01, 0xFF, 0xFF,
       ]
     end
   end
diff --git a/spec/ttfunk/table/os2_spec.rb b/spec/ttfunk/table/os2_spec.rb
index d2d6feea..a7ff11bb 100644
--- a/spec/ttfunk/table/os2_spec.rb
+++ b/spec/ttfunk/table/os2_spec.rb
@@ -31,7 +31,7 @@
   let(:font_path) { test_font('DejaVuSans') }
   let(:font) { TTFunk::File.open(font_path) }
 
-  let(:expected_fields) do # rubocop: disable Metrics/BlockLength
+  let(:expected_fields) do
     {
       version: 1,
       ave_char_width: 1038,
@@ -67,12 +67,12 @@
       cap_height: nil,
       default_char: nil,
       break_char: nil,
-      max_context: nil
+      max_context: nil,
     }
   end
 
   let(:error_message) do
-    <<-ERROR_MESSAGE
+    <<~ERROR_MESSAGE
          field: %<field>s
       expected: %<expected_value>s
            got: %<actual_value>s
@@ -80,13 +80,11 @@
   end
 
   def build_error_message(field, expected_value, actual_value)
-    strip_leading_spaces(
-      format(
-        error_message,
-        field: field,
-        expected_value: expected_value,
-        actual_value: actual_value
-      )
+    format(
+      error_message,
+      field: field,
+      expected_value: expected_value,
+      actual_value: actual_value,
     )
   end
 
@@ -96,7 +94,7 @@ def build_error_message(field, expected_value, actual_value)
       actual_value = actual_value.value if actual_value.respond_to?(:value)
       expect(actual_value).to(
         eq(expected_value),
-        build_error_message(field, expected_value, actual_value)
+        build_error_message(field, expected_value, actual_value),
       )
     end
   end
@@ -108,16 +106,17 @@ def build_error_message(field, expected_value, actual_value)
       TTFunk::BitField.new(
         TTFunk::BinUtils.stitch_int(
           encoded[code_page_range_field_indices].unpack('N*'),
-          bit_width: 32
-        )
+          bit_width: 32,
+        ),
       )
     end
 
     let(:char_range) do
       TTFunk::BitField.new(
         TTFunk::BinUtils.stitch_int(
-          encoded[char_range_field_indices].unpack('N*'), bit_width: 32
-        )
+          encoded[char_range_field_indices].unpack('N*'),
+          bit_width: 32,
+        ),
       )
     end
 
@@ -127,9 +126,7 @@ def build_error_message(field, expected_value, actual_value)
 
       it 'roundtrips correctly' do
         original_unicode_map.each_key { |char| subset.use(char) }
-        reconstituted = described_class.new(
-          TestFile.new(StringIO.new(encoded))
-        )
+        reconstituted = described_class.new(TestFile.new(StringIO.new(encoded)))
 
         skipped_fields = %i[char_range code_page_range]
         expected_fields.each do |field, expected_value|
@@ -140,9 +137,7 @@ def build_error_message(field, expected_value, actual_value)
 
           expect(actual_value).to(
             eq(expected_value),
-            build_error_message(
-              field, expected_value, actual_value
-            )
+            build_error_message(field, expected_value, actual_value),
           )
         end
 
@@ -161,13 +156,11 @@ def build_error_message(field, expected_value, actual_value)
           curr_symbols,
           shapes,
           ogham,
-          old_italic
+          old_italic,
         ]
 
         char_range_bits.each do |bit|
-          expect(reconstituted.char_range.on?(bit)).to(
-            eq(true), build_error_message(bit, true, false)
-          )
+          expect(reconstituted.char_range.on?(bit)).to(be(true), build_error_message(bit, true, false))
         end
       end
 
@@ -179,11 +172,11 @@ def build_error_message(field, expected_value, actual_value)
           end
         end
 
-        expect(char_range.on?(greek)).to eq(false)
-        expect(char_range.on?(armenian)).to eq(true)
-        expect(char_range.on?(hebrew)).to eq(false)
-        expect(char_range.on?(shapes)).to eq(true)
-        expect(char_range.on?(old_italic)).to eq(false)
+        expect(char_range.on?(greek)).to be false
+        expect(char_range.on?(armenian)).to be true
+        expect(char_range.on?(hebrew)).to be false
+        expect(char_range.on?(shapes)).to be true
+        expect(char_range.on?(old_italic)).to be false
       end
     end
 
@@ -192,9 +185,7 @@ def build_error_message(field, expected_value, actual_value)
       let(:mac_roman_code_page_bit) { 29 }
 
       before do
-        mapping = TTFunk::Subset::CodePage.unicode_mapping_for(
-          Encoding::MACROMAN
-        )
+        mapping = TTFunk::Subset::CodePage.unicode_mapping_for(Encoding::MACROMAN)
 
         mapping.each_value { |code_point| subset.use(code_point) }
       end
@@ -204,7 +195,7 @@ def build_error_message(field, expected_value, actual_value)
       end
 
       it 'sets the correct code page bit' do
-        expect(code_page_range.on?(mac_roman_code_page_bit)).to eq(true)
+        expect(code_page_range.on?(mac_roman_code_page_bit)).to be true
       end
     end
 
@@ -213,9 +204,7 @@ def build_error_message(field, expected_value, actual_value)
       let(:windows_1252_code_page_bit) { 0 }
 
       before do
-        mapping = TTFunk::Subset::CodePage.unicode_mapping_for(
-          Encoding::CP1252
-        )
+        mapping = TTFunk::Subset::CodePage.unicode_mapping_for(Encoding::CP1252)
 
         mapping.each_value { |code_point| subset.use(code_point) }
       end
@@ -225,7 +214,7 @@ def build_error_message(field, expected_value, actual_value)
       end
 
       it 'sets the correct code page bit' do
-        expect(code_page_range.on?(windows_1252_code_page_bit)).to eq(true)
+        expect(code_page_range.on?(windows_1252_code_page_bit)).to be true
       end
     end
   end
diff --git a/spec/ttfunk/table/vorg_spec.rb b/spec/ttfunk/table/vorg_spec.rb
index d2399f5d..b803ebf3 100644
--- a/spec/ttfunk/table/vorg_spec.rb
+++ b/spec/ttfunk/table/vorg_spec.rb
@@ -12,10 +12,7 @@
 
   describe '#origins' do
     it 'includes origins for certain chars traditionally written vertically' do
-      code_points =
-        %w[〱 ０ １ ２ ３ ４ ５ ６ ７ ８ ９].map do |c|
-          c.unpack1('U*')
-        end
+      code_points = %w[〱 ０ １ ２ ３ ４ ５ ６ ７ ８ ９].map { |c| c.unpack1('U*') }
 
       glyph_ids = code_points.map { |cp| cmap[cp] }
       glyph_ids.each { |glyph_id| expect(origins).to include(glyph_id) }
@@ -26,17 +23,13 @@
     it 'finds the vertical origin when explicitly available' do
       glyph_id = cmap['〱'.unpack1('U*')]
       expect(vorg_table.origins).to include(glyph_id)
-      expect(vorg_table.for(glyph_id)).to_not(
-        eq(vorg_table.default_vert_origin_y)
-      )
+      expect(vorg_table.for(glyph_id)).to_not eq(vorg_table.default_vert_origin_y)
     end
 
     it 'falls back to the default vertical origin' do
       glyph_id = cmap['ろ'.unpack1('U*')]
       expect(vorg_table.origins).to_not include(glyph_id)
-      expect(vorg_table.for(glyph_id)).to(
-        eq(vorg_table.default_vert_origin_y)
-      )
+      expect(vorg_table.for(glyph_id)).to eq(vorg_table.default_vert_origin_y)
     end
   end
 
@@ -60,9 +53,7 @@
     end
 
     it 'includes the same default vertical origin' do
-      expect(reconstituted.default_vert_origin_y).to(
-        eq(vorg_table.default_vert_origin_y)
-      )
+      expect(reconstituted.default_vert_origin_y).to eq(vorg_table.default_vert_origin_y)
     end
   end
 end
diff --git a/spec/ttfunk/ttf_encoder_spec.rb b/spec/ttfunk/ttf_encoder_spec.rb
index 64d2c660..07044d36 100644
--- a/spec/ttfunk/ttf_encoder_spec.rb
+++ b/spec/ttfunk/ttf_encoder_spec.rb
@@ -54,7 +54,7 @@
 
       tables.each_cons(2) do |first_table, second_table|
         expect(new_font.directory.tables[first_table][:offset]).to(
-          be < new_font.directory.tables[second_table][:offset]
+          be < new_font.directory.tables[second_table][:offset],
         )
       end
     end
diff --git a/ttfunk.gemspec b/ttfunk.gemspec
index e4e1d2a4..7ae51f2e 100644
--- a/ttfunk.gemspec
+++ b/ttfunk.gemspec
@@ -10,7 +10,7 @@ Gem::Specification.new do |spec|
 
   spec.homepage = 'https://prawnpdf.org'
   spec.metadata = {
-    'rubygems_mfa_required' => 'true'
+    'rubygems_mfa_required' => 'true',
   }
 
   signing_key = File.expand_path('~/.gem/gem-private_key.pem')
@@ -30,7 +30,7 @@ Gem::Specification.new do |spec|
     'Daniel Nelson',
     'Jonathan Greenberg',
     'James Healy',
-    'Cameron Dutro'
+    'Cameron Dutro',
   ]
   spec.email = [
     'alex@pointless.one',
@@ -39,11 +39,11 @@ Gem::Specification.new do |spec|
     'dnelson@bluejade.com',
     'greenberg@entryway.net',
     'jimmy@deefa.com',
-    'camertron@gmail.com'
+    'camertron@gmail.com',
   ]
 
   spec.files = Dir.glob('lib/**/*') +
     ['CHANGELOG.md', 'README.md', 'COPYING', 'LICENSE', 'GPLv2', 'GPLv3']
   spec.required_ruby_version = '>= 2.7'
-  spec.add_development_dependency('prawn-dev', '~> 0.3.0')
+  spec.add_development_dependency('prawn-dev', '~> 0.4.0')
 end