This reverts commit 9a1abedcde, reversing
changes made to c72d6c91a7.
Conflicts:
activerecord/CHANGELOG.md
activerecord/test/models/comment.rb
This change break integration with activerecord-deprecated_finders so
I'm reverting until we find a way to make it work with this gem.
Changed the call to a scope block to be evaluated with instance_eval.
The result is that ScopeRegistry can use the actual class instead of base_class when
caching scopes so queries made by classes with a common ancestor won't leak scopes.
