When I mean refactor, is to either do a extract variable, i.e: `none_match = http.get('HTTP_IF_NONE_MATCH', '')`, and/or simplify the call to the `mtime` comparison, i.e: `none_match.strip('"') == '%s' % mtime`.

Since running this plugin really assumes that you are running this live, then the less code (or less brackets), the better. Just a suggestion.