def shell_str(s: str) ->str:
    """A member_type for strings that should be split upon parsing through `shlex.split()`.

    For example, the option value `--foo --bar=val` would be split into `['--foo', '--bar=val']`,
    and then the parser will safely merge this expanded list with any other values defined for the
    option.

    :API: public
    """
    return s
