Git clone should one 1 liner
Add support for JRuby 1.7.0 RC2.
Merge pull request #218 from doxavore/add_jruby_170rc2

Add support for JRuby 1.7.0 RC2
added 1.9.3-p286
Merge pull request #221 from mdemare/master

Added ruby 1.9.3-p286
ruby-build 20121020
Updated README

Seems like you have to run `rbenv install --list`, not `rbenv install`, to see the available versions.
Merge pull request #225 from manuelmeurer/patch-1

Updated README
Added support for JRuby 1.7.0
Merge pull request #226 from hpoydar/master

Added support for JRuby 1.7.0, released on 22 October 2012
Merge pull request #206 from baer/patch-2

Git clone should one 1 liner
ruby-build 20121022
Formula for Ruby 2.0.0-preview1
Merge pull request #228 from guilleiguaran/ruby-2.0-preview1

Definition for Ruby 2.0.0-preview1
Add formula for rbx-2.0.0-rc1
Merge pull request #229 from guilleiguaran/rbx-2.0.0-rc1

Add formula for rbx-2.0.0-rc1
README: use last stable version of MRI in examples
Merge pull request #231 from guilleiguaran/patch-1

README: use last stable version of MRI in examples
ruby-build 20121104
Remove dollar signs so commands can be copied and pasted without modification