def ios_dash(s: str) -> str:
    """
    Convert a string with a dash (—) to just double-hyphens (--).

    Before::

        /rocket user edit —name "Steven Universe"

    After::

        /rocket user edit --name "Steven Universe"

    :param s: string to convert
    :return: string where all dashes are replaced with double-hyphens
    """
    return s.replace("—", "--")