jashkenas/backbone — pull request #2783 by caseywebdev (2013-09-25 20:03:02+00:00)
Title: Fix #2470 Do not mutate options in _prepareModel

Now that Tim's changes have been merged, we no longer need to mutate the options object in `_prepareModel`. Using a PR for a sanity check @jashkenas @tgriesser @braddunbar