Just started to study rubinius and found this small typo.
Hope that my next commits will come out with more helpful changes =)
Fix typo in Array#isort_block!
Thank you and have fun working on Rubinius!
If you have questions don't hesitate to ask, the common hangout is #rubinius on freenode, irc.
@burningTyger ok, I'll definitely join you guys in irc!