docs: def invoke_with_usage (self, args, **kwargs):
          """Invoke the command with standardized usage-help processing. Same
          calling convention as `Command.invoke()`, except here *args* is an
          un-parsed list of strings.
  
          """
          ap = self.get_arg_parser (**kwargs)
          args = ap.parse_args (args)
          return self.invoke (args, **kwargs)