old_contents: from __future__ import unicode_literals
  
  import six
  
  
  # NOTE https://github.com/python/cpython/blob/master/Lib/os.py#L1025
  def fspath(path):
  
      path_types = six.string_types
      path_type_names = [pt.__name__ for pt in path_types]
  
      if isinstance(path, path_types):
          return path
  
      path_type = type(path)
      try:
          path_repr = path_type.__fspath__(path)
      except AttributeError:
          if hasattr(path_type, '__fspath__'):
              raise
          else:
              raise TypeError('expected {} or os.PathLike object, '
                              'not {}'.format(','.join(path_types), path_type.__name__))
      if isinstance(path_repr, path_types):
          return path_repr
      else:
          raise TypeError('expected {}.__fspath__() to return {} '
                          'not {}'.format(path_type.__name__,
                                          ','.join(path_type_names),
                                          type(path_repr).__name__))
  
new_contents: from __future__ import unicode_literals
  
  import six
  
  
  # NOTE https://github.com/python/cpython/blob/master/Lib/os.py#L1025
  def fspath(path):
      path_types = six.string_types
      path_type_names = [pt.__name__ for pt in path_types]
  
      if isinstance(path, path_types):
          return path
  
      path_type = type(path)
      try:
          path_repr = path_type.__fspath__(path)
      except AttributeError:
          if hasattr(path_type, '__fspath__'):
              raise
          else:
              raise TypeError('expected {} or os.PathLike object, '
                              'not {}'.format(','.join(path_type_names), path_type.__name__))
  
      if isinstance(path_repr, path_types):
          return path_repr
      else:
          raise TypeError('expected {}.__fspath__() to return {} '
                          'not {}'.format(path_type.__name__,
                                          ','.join(path_type_names),
                                          type(path_repr).__name__))
  
subject: Correct variable in exception.