else.
:param short_help: the short help to use for this command.  This is
                   shown on the command listing of the parent command.
:param add_help_option: by default each command registers a ``--help``
                        option.  This can be disabled by this parameter.
:param no_args_is_help: this controls what happens if no arguments are
                        provided.  This option is disabled by default.
                        If enabled this will add ``--help`` as argument
                        if no arguments are passed
:param hidden: hide this command from help outputs.

:param deprecated: issues a message indicating that
                         the command is deprecated.

.. versionchanged:: 8.1
    ``help``, ``epilog``, and ``short_help`` are stored unprocessed,
    all formatting is done when outputting help text, not at init,
    and is done even if not using the ``@command`` decorator.

.. versionchanged:: 8.0
    Added a ``repr`` showing the command name.

.. versionchanged:: 7.1
    Added the ``no_args_is_help`` parameter.

.. versionchanged:: 2.0
    Added the ``context_settings`` parameter.
Nr=