parameters: (self, diff_input)
docstring: Parses a diff.
  
          Args:
            diff_input: An iterable object.
docstring_summary: Parses a diff.
docstring_tokens: Parses a diff .
function: def __init__(self, diff_input):
          """Parses a diff.
  
          Args:
            diff_input: An iterable object.
          """
          self.files = self._parse_into_diff_files(diff_input)
function_tokens: def __init__ ( self , diff_input ) : self . files = self . _parse_into_diff_files ( diff_input )