def _sort_text(definition):
    """ Ensure builtins appear at the bottom.
    Description is of format <type>: <module>.<item>
    """

    # If its 'hidden', put it next last
    prefix = 'z{}' if definition.name.startswith('_') else 'a{}'
    return prefix.format(definition.name)
Ensure builtins appear at the bottom.
    Description is of format <type>: <module>.<item>