github/linguist — pull request #126 by jeffreykegler (2012-02-17 17:44:56+00:00)
Title: Add support for C code in Cweb (.w) files.

Cweb is Don Knuth's literate programming system for C programming.

Caveats: I have NOT tested, and do NOT know Ruby. In other words, I'm guessing this is the fix.