adobe/brackets — pull request #4845 by megatolya (2013-08-20 19:11:16+00:00)
Title: Clean up _getFileExtension() method and fix all its callers

Fixes [4574](https://github.com/adobe/brackets/issues/4575)

I've took into account comments on [this](https://github.com/adobe/brackets/pull/4651) pull request and fixed it.