mxcl/homebrew — pull request #20573 by surma (2013-06-18 07:57:26+00:00)
Title: Allow dashes in user/orga names for `brew versions` on taps

If a GitHub username (or organization name) contains a dash, brew versions will parse the path wrongly and won't be able to detect any versions at all.

This fix simply allows dashes in the first section of the regexp.