Run format-webkit on webkitpy code (without string conversion).

third_party/WebKit/Tools/Scripts/webkitpy/style/optparser.py

 # Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1.  Redistributions of source code must retain the above copyright
 #     notice, this list of conditions and the following disclaimer.
 # 2.  Redistributions in binary form must reproduce the above copyright
 #     notice, this list of conditions and the following disclaimer in the
 #     documentation and/or other materials provided with the distribution.
@@ skipping 425 matching lines @@
                               '%s: value must be between 1 and 5'
                               % min_confidence)
 
         if filter_value:
             filter_rules = self._parse_filter_flag(filter_value)
         else:
             filter_rules = []
 
         try:
             validate_filter_rules(filter_rules, self._all_categories)
-        except ValueError, err:
+        except ValueError as err:
             self._parse_error(err)
 
         options = CommandOptionValues(filter_rules=filter_rules,
                                       git_commit=git_commit,
                                       diff_files=diff_files,
                                       is_verbose=is_verbose,
                                       min_confidence=min_confidence,
                                       output_format=output_format)
 
         return (paths, options)