diff --git a/src/gutenberg2zim/entrypoint.py b/src/gutenberg2zim/entrypoint.py
index ebda3e8..cd13f82 100755
--- a/src/gutenberg2zim/entrypoint.py
+++ b/src/gutenberg2zim/entrypoint.py
@@ -190,9 +190,9 @@ def f(x):
             only_books=books,
             force=force,
             s3_storage=s3_storage,
-            optimizer_version=optimizer_version
-            if not use_any_optimized_version
-            else None,
+            optimizer_version=(
+                optimizer_version if not use_any_optimized_version else None
+            ),
         )
     if one_lang_one_zim_folder:
         if languages == []:
diff --git a/src/gutenberg2zim/urls.py b/src/gutenberg2zim/urls.py
index deada12..60fa7ab 100644
--- a/src/gutenberg2zim/urls.py
+++ b/src/gutenberg2zim/urls.py
@@ -8,7 +8,6 @@
 
 
 class UrlBuilder:
-
     """
     Url builder for the files of a Gutenberg book.
     Example: