Updates code sample to match Guides
Updates code sample to match Guides

https://github.com/emberjs/guides/pull/1770
rtablada/data,arenoir/data,arenoir/data,workmanw/data,rtablada/data,courajs/data,HeroicEric/data,HeroicEric/data,workmanw/data,rtablada/data,swarmbox/data,arenoir/data,HeroicEric/data,swarmbox/data,rtablada/data,arenoir/data,swarmbox/data,davidpett/data,davidpett/data,davidpett/data,courajs/data,davidpett/data,swarmbox/data,courajs/data,workmanw/data,HeroicEric/data,courajs/data,workmanw/data