* test/ruby/test_thread.rb: Added various ConditionVariable tests.
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@30693 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r30647,r30650 and r30651 from trunk into ruby_1_9_2.¶
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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@30693 b2dd03c8-39d4-4d8f-98ff-823fe69b080e