Regex fix

[mreishus]

Hi - I'm maintaining my own version of Horton that works slightly differently, but I recently found a bugfix that you might want to pull into the main version as well. Explanation and small change are here: mreishus@02c7a95

[jdaigle]

Thanks @mreishus! If you create a pull request, I'll be happy to merge it in.

p.s. I'm excited that someone else has found this tool useful and/or inspirational.