Update deprecation message Fix bug with single callbacks
Update deprecation message
Fix bug with single callbacks

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