Eager loading made to use relation's in_clause_length instead of host's one (fixes #8474)
Test nested fields with AssociationProxy mockup & fix AssociationProxy support in form helper
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
evaluate the dependency blocks at the instance level, not class level
remove 'update' duplications
Set default value to ActiveModel::Validator initializer attribute

Makes it easier to test its objects.
use multiline do-end blocks and rearrange definition for clarity
Merge pull request #8839 from mattdbridges/clarify_chdir

Clarify Dir.chdir definition
adding small mention one single line blocks in contributing to rails
[ci skip]
Merge pull request #8849 from mattdbridges/contributing_to_rails

Adding mention about single-line blocks in Contributing to Rails [ci skip]
Merge pull request #8848 from Irio/master

Set default value to ActiveModel::Validator initializer attribute
s/messqage/message/ in message_encryptor_test.rb
Merge pull request #8859 from tehgeekmeister/master

Fix a typo in a test.
adding start / finish on the instrumenter, adding tests for the class
extract logger and development checks to methods
adding missing requires
fire a notification when the request stops / starts
Remove redundant double quotation marks
update assets guide code styling

* 1.9 hash syntax
* proper formatting around one line blocks
* do-end for multiline blocks