tanoku/redcarpet — pull request #104 by sunaku (2012-01-23 10:29:34+00:00)
Title: bin/redcarpet: allow --<extension> options in ARGV

I run `:!redcarpet % > %.html && xdg-open %.html` in Vim to see how my
README.markdown files would appear on GitHub. Only thing is, GitHub
seems to enable some additional extensions like :no_intra_emphasis, so
this lets me specify those extensions at the command line.

Error checking for (in)valid extension names would be a nice addition.