sheerun/vim-polyglot — pull request #12 by alex-ross (2013-12-26 22:54:34+00:00)
Title: Adds rabl support.

Source code is not by me. It comes from [yaymukund][https://github.com/yaymukund/vim-rabl].

So what is [rabl][https://github.com/nesquena/rabl]? It's an ruby API builder for JSON and XML files. So all *.rabl files are basically ruby files so this code will actually set rabls filetype to ruby and add some improved syntax highlighting.