docs: def options_formatting(self):
          """ Formating options """
          group = self.parser.add_argument_group("Format")
          group.add_argument(
              "--format", dest="formatting", default=None,
              help="Custom output format using the {} expansion")
          group.add_argument(
              "--value", dest="values", action="append", default=[],
              help="Values for the custom formatting string")