sensible.vim: compute setcmd in DefaultSet()

Eliminates TranslateDefault()

plugin/sensible.vim

@@ -31,10 +31,10 @@ let s:defaultval_no = ['set no', '']
 let s:defaultval_checked = ['" ', '']  " translates to comment -> no :set
 let s:default_opts = []
 let s:default_vals = {}
-function! s:DefaultSet(option, value) abort
+function! s:DefaultSet(option, setcmd) abort
   if exists('&' . a:option)
     call add(s:default_opts, a:option)
-    let s:default_vals[a:option] = a:value
+    let s:default_vals[a:option] = a:setcmd[0] . a:option . a:setcmd[1]
   endif
 endfunction
 function! s:Default(option, value) abort
@@ -146,15 +146,9 @@ function! s:MaySet(option) abort
   return s:global_settings !~# ('\n\(\s\+\|no\)\?' . a:option . '\(=[^\n]*\n\|\n\)' . '[^\n]*' . s:homerx)
 endfunction
 
-function! s:TranslateDefault(opt) abort
-  if ! s:MaySet(a:opt)
-    return ''
-  endif
-  let val = s:default_vals[a:opt]
-  return val[0] . a:opt . val[1]
-endfunction
 function! s:ComputeSettings() abort
-  return join(map(copy(s:default_opts), 's:TranslateDefault(v:val)'), "\n")
+  call filter(s:default_opts, 's:MaySet(v:val)')
+  return join(map(s:default_opts, 's:default_vals[v:val]'), "\n")
 endfunction
 
 call s:CheckDefaults()