rails/rails — pull request #12550 by Peeja (2013-10-15 19:45:47+00:00)
Title: HashWithIndifferentAccess#update respects #to_hash

Hash#update converts its argument with #to_hash before looking at its values.
This change makes HashWithIndifferentAccess do the same thing.

I'd like to write a test to go with this, but I couldn't find a test for
HashWithIndifferentAccess. Is there one?