merges the latter half of r24423 from trunk into ruby_1_9_1.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@24473 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges the latter half of r24423 from trunk into ruby_1_9_1.
capable.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@24473 b2dd03c8-39d4-4d8f-98ff-823fe69b080e