def _format_option(opt):
    """Format the output for a `click.Option`."""
    opt = _get_help_record(opt)

    yield '.. option:: {}'.format(opt[0])
    if opt[1]:
        yield ''
        for line in statemachine.string2lines(
                opt[1], tab_width=4, convert_whitespace=True):
            yield _indent(line)
Format the output for a `click.Option`.