It may be because your tabulation is 2 spaces that you don't see it.
Look at what I get below: `^I` is a tabulation
![screenshot 2014-03-29 at 5 12 36 pm](https://cloud.githubusercontent.com/assets/634478/2558825/0d327506-b75d-11e3-8070-c54bfcb375b2.png)