That is like a good question I wouldn't mind to discuss. In my experience through libraries / books / other people, it seems that tests for  directives uses just `scope` and the rest `$scope`. But thinking it well, doesn't make THAT sense.

Maybe we should apply the biggest issues here (the globar vars and some typos) and discuss on the other "convention" thread what convention we should follow so we don't have a convention per file.