luvit/luvit — pull request #338 by hnakamur (2012-08-27 16:33:14+00:00)
Title: Fix an error occurs in utils.colorize when string is nil.

Please see https://github.com/hnakamur/luvit/commit/21e5d9ed5f67193630ac03328e5c8df587835286#commitcomment-1770450