rubinius/rubinius — pull request #3022 by jemc (2014-05-02 16:33:21+00:00)
Title: Fix #3017, "when Hash#compare_by_identity is called, it should not copy the keys"

Make Hash#new_bucket not dup String keys if compare_by_identity is enabled.
Fixes https://github.com/rubinius/rubinius/issues/3017