COMMIT [Marc-Andre Lafortune] Expand spec for Enumerator.new with block	http://github.com/rubyspec/rubyspec/commit/454d09f51cdedf1bc857229ab057aaaaa4d8cc5f
COMMIT [Charles Oliver Nutter] Add simple spec for -x command line arg.	http://github.com/rubyspec/rubyspec/commit/27107ef52058a0d017a16ed897b55a0325c78c87
COMMIT [Charles Oliver Nutter] Add a couple basic IO#readbyte specs (1.9)	http://github.com/rubyspec/rubyspec/commit/467655887b84b1a5f15b501d4c365efc017c0408