rails/rails — pull request #8340 by skojin (2012-11-27 16:12:23+00:00)
Title: No sort Hash options in #grouped_options_for_select

That's no make sense to sort Hash grouped_options. Possible that make sense in ruby 1.8 when Hash was unsorted. Now I expect see options in same order like in Hash.

I checked, that hash.sort like is from first implementation https://github.com/evanfarrar/rails/commit/8761663a68bd7ddd918f78fb3def4697784024f2#L1R327