adobe/brackets — pull request #9780 by MarcelGerber (2014-11-02 12:51:55+00:00)
Title: Add GitHub Flavored Markdown mode, Add some more Markdown fileExtensions

Note you can only ever get into GFM mode using the Language Switcher.
Also added some more `fileExtensions` for Markdown. Source: https://github.com/github/markup#markups