* tool/change_maker.rb (#diff2index): check Encoding::BINARY.
  BASERUBY may still be 1.8.x.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39712 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/thread.rb (Queue#push): return self.
* lib/thread.rb (Queue#clear): ditto.
* lib/thread.rb (SizedQueue#push): ditto.
* test/thread/test_queue.rb: add tests for the above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39713 b2dd03c8-39d4-4d8f-98ff-823fe69b080e