rubinius/rubinius — pull request #1213 by locks (2011-10-09 15:33:21+00:00)
Title: 1.9 support (see description for details)

* Array#flatten
* Struct#to_s
* Struct#members
* Numeric#img and Numeric#imaginary
* Numeric#rect and Numeric#rectangulr
* Numeric#rationalize
* NilClass#rationalize
* Array#rotate and Array#rotate!
* indentation on Prime#prime_division
* Array#select!