If a counter_cache is defined, then using update_attributes and changing
the primary key on an association will make sure that the corresponding
counter on the association is changed properly. Fixes #9722.
Merge pull request #9737 from wangjohn/counter_cache_update_attributes_fix

The counter cache will now work correctly when the foreign key is changed. Fixes #9722.
fixes markup of the CHANGELOG entry from 455d710
Fixed a bug where the inflector would replace camelCase strings and disregarding specified acronyms, fixes #8015
Added Inflector#underscore fix to the changelog
Merge pull request #8156 from fredwu/acronym_fix-master

Fix for inflector's incorrect camelCase replacement for acronyms
revises the CHANGELOG entry from 26aa265 [ci skip]