Formatting consistency in app.js

I propose that the question mark format should be consistent throughout app.js

-before 
![screen shot 2014-07-11 at 12 38 38 pm](https://cloud.githubusercontent.com/assets/5373129/3557748/3bd13aa0-0933-11e4-8451-6b38519efe5f.png)
-after
![screen shot 2014-07-11 at 12 39 04 pm](https://cloud.githubusercontent.com/assets/5373129/3557749/3bd2370c-0933-11e4-9819-d556a3ce90f0.png)

I just started working in Ionic and I'm loving it so far.