bug: url_for in blueprint may have // at the beginning
bug: url_for in blueprint may have // at the beginning

jrocketfingers/sanic,ashleysommer/sanic,lixxu/sanic,lixxu/sanic,yunstanford/sanic,lixxu/sanic,channelcat/sanic,Tim-Erwin/sanic,yunstanford/sanic,channelcat/sanic,ashleysommer/sanic,Tim-Erwin/sanic,channelcat/sanic,r0fls/sanic,ai0/sanic,jrocketfingers/sanic,yunstanford/sanic,channelcat/sanic,lixxu/sanic,ai0/sanic,yunstanford/sanic,r0fls/sanic,ashleysommer/sanic