gruntjs/grunt-contrib-coffee — pull request #108 by abe33 (2013-12-30 10:39:52+00:00)
Title: Add joinExt option

When joining many literate CoffeeScript files, the generated
joined file still use the `coffee` extension. The joined
file can't be compiled or documented properly due to that.

Passing `.src.litcoffee` or `.src.coffee.md` in `joinExt` fix it.