github/linguist — pull request #286 by dimituri (2012-11-01 07:03:57+00:00)
Title: Added detection for the Elm language

http://elm-lang.org/

The lexer is set to Haskell, since at the moment Elm is syntactically a subset of Haskell. The official website uses CodeMirror with the mode set to Haskell, as well.