def _unquote_or_none(s):
    if s is None:
        return s
    return escape.url_unescape(s, encoding=None, plus=False)
Returns a recursively simplified form of this query, where "second-order"
dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py/_unquote_or_none--crossover with--dataset/ETHPy150Open dokipen/whoosh/src/whoosh/query.py/Query.simplify