fix Router.check_dynamic_route_exists
fix Router.check_dynamic_route_exists

yunstanford/sanic,lixxu/sanic,ashleysommer/sanic,lixxu/sanic,lixxu/sanic,channelcat/sanic,ashleysommer/sanic,channelcat/sanic,channelcat/sanic,yunstanford/sanic,lixxu/sanic,ashleysommer/sanic,yunstanford/sanic,channelcat/sanic,yunstanford/sanic