Inflector irregular singularize rules
Adding Back Rails::Engine::Railties#engines

Removing it breaks functionality with gems such as Thinking Sphinx.
This restores it with a deprecation warning. Closes #8551
Added test case to prevent regression of chained, preloaded scopes. (#7490)
Test abstract controller's localize method.
Removed ActionController::Base dependency from abstract controller translation tests.
strong parameters filters permitted scalars
Removing warning: shadowing outer local variable
Merge pull request #9004 from arunagw/warning_removed_shadowing_outer

Removing warning: shadowing outer local variable
Created state for a transaction and added tests.
added rake db:create that executes mysql:build_databases and postgresql:build_databases
removed the puts statement and simplified the execute statement
Merge pull request #9005 from ranjaykrishna/dbcreate

added  a db create rake task.
Removed reflects_transaction_state.
added db:drop task that executes mysql:drop_databses and postgresql:drop_databases
Added a changelog entry.
Merge pull request #9006 from wangjohn/activerecord_transaction_state

Created state for a transaction and added tests.
Merge pull request #9008 from ranjaykrishna/dbcreate

Added a new rake task in activerecord
Fix markdown formatting to highlight block in changelog [ci skip]
Use 1.9 hash style in docs/comments [ci skip]
Add missing assert calls