def __init__(self, meta, url=None, email_mode=False, **kwargs):
        """Constructor.

        :param meta: see superclass
        :param url: Optional URL to create hyperlink for keys
        :type url: str
        """
        DiffFormatter.__init__(self, meta, **kwargs)
        self._url = url
        self._email = email_mode
def __init__ ( self , meta , url = None , email_mode = False , ** kwargs ) : DiffFormatter . __init__ ( self , meta , ** kwargs ) self . _url = url self . _email = email_mode
Constructor.

        :param meta: see superclass
        :param url: Optional URL to create hyperlink for keys
        :type url: str