jruby
https://github.com/jruby/jruby
Ruby
JRuby, an implementation of Ruby on the JVM
Month#previous
No Docs, write some!
Edit
git clone [email protected]:jruby/jruby.git
cd jruby
open
Contribute
# Make a new branchgit checkout -b -your-name--update-docs-Month-previous-for-pr
# Commit to gitgit add git commit -m "better docs for Month#previous"
# Open pull requestgem install hub # on a mac you can `brew install hub`
hub fork
git push <your name> -your-name--update-docs-Month-previous-for-pr
hub pull-request
# Celebrate!