Fix bad regex for submodule from #118
Fix bad regex for submodule from #118

The regex in bash and zsh doesn't need to be quoted. It resulted a
bad regex warning in zsh (#127) and it didn't worked in submodule.
Plus, bash and zsh regexes have perlish syntax.

tsbarnes/liquidprompt,joshuarubin/dotfiles,smadhueagle/liquidprompt,jonathanjsimon/liquidprompt,tocomo/liquidprompt,laurentbardin/liquidprompt,dtschan/liquidprompt,mathieumd/liquidprompt,dpilone/liquidprompt,elementalvoid/liquidprompt,milouse/liquidprompt,pkkolos/liquidprompt,lyoshenka/liquidprompt,enrdstrm/liquidprompt,joshuarubin/dotfiles,BobHood/liquidprompt,illwieckz/liquidprompt,tkuminecz/liquidprompt,tstone2077/liquidprompt,alexprengere/liquidprompt,colinlieberman/liquidprompt,nojhan/liquidprompt,joshuarubin/dotfiles,jaesivsm/liquidprompt,kenrachynski/liquidprompt,joshuarubin/dotfiles,dan-cleinmark/liquidprompt,timhyson/liquidprompt