docs: def deb64_app(parser, cmd, args):  # pragma: no cover
      """
      base64 decode a value.
      """
  
      parser.add_argument('value', help='the value to base64 decode, read from stdin if omitted', nargs='?')
      args = parser.parse_args(args)
      return deb64(pwnypack.main.string_value_or_stdin(args.value))