Stopped converting match dict keys to bytestrings when resolving URLs.

Test suite is passing, but if any regression would be detected, we might replace smart_str by force_unicode.

Author: claudep

django/core/urlresolvers.py

@@ -306,10 +306,8 @@ def resolve(self, path):
  tried.append([pattern])
  else:
  if sub_match:
- sub_match_dict = dict([(smart_str(k), v) for k, v in match.groupdict().items()])
- sub_match_dict.update(self.default_kwargs)
- for k, v in sub_match.kwargs.iteritems():
- sub_match_dict[smart_str(k)] = v
+ sub_match_dict = dict(match.groupdict(), **self.default_kwargs)
+ sub_match_dict.update(sub_match.kwargs)
  return ResolverMatch(sub_match.func, sub_match.args, sub_match_dict, sub_match.url_name, self.app_name or sub_match.app_name, [self.namespace] + sub_match.namespaces)
  tried.append([pattern])
  raise Resolver404({'tried': tried, 'path': new_path})