Fixed whitespace issues reported by flake8 test

mkdocs/config.py

@@ -52,10 +52,10 @@ DEFAULT_CONFIG = {
 
     # PyMarkdown extension names.
     'markdown_extensions': (),
-    
-    # Remove the content of site_dir to remove old files which dropped out 
+
+    # Remove the content of site_dir to remove old files which dropped out
     # of the documentation
-    'clear_site_dir': False, 
+    'clear_site_dir': False,
 
     # Determine if the site should generate a json search index and include
     # search elements in the theme. - TODO