Fix CookieStore middleware inheritance hierarchy s.t. it inherits from Rack::Session::Abstract::ID rather than Rack::Session::Cookie.
Revert cb3181e - no longer required.
target_reflection_has_associated_record? refactoring
improved different_target conditions
Add CHANGELOG entry for YAML parsing removal

This is for commit e80546cdec56a9c3fcaf6217cba08a02d789d2bc.
Merge pull request #8827 from sikachu/master-remove-yaml-changelog

Add CHANGELOG entry for YAML parsing removal
Fix syntax error and remove duplicated test
Fix warning: & interpreted as argument prefix
Remove :yaml related tests and fix other related to parsing empty arrays

All Action Pack tests are green.
Merge pull request #8826 from acapilleri/different_target

Improved different_target conditions
Merge pull request #8823 from acapilleri/target_reflection_has_associated_record

Refactor target_reflection_has_associated_record?
Correcting the command 'rake rails:update:bin' in the release notes.[ci skip]
Merge pull request #8833 from diogomafra/release_notes

Correcting the command 'rake rails:update:bin' in the release notes. [ci skip]
Merge pull request #8824 from mjtko/fix/cookie-store-inheritance

Modify CookieStore middleware inheritance to avoid subclassing Rack::Session::Cookie [Fix for #7372]
Fix typo in deprecation warning
Merge pull request #8842 from nthj/patch-1

Fix typo in deprecation warning
use multiline do-end blocks and rearrange definition for clarity
Merge pull request #8839 from mattdbridges/clarify_chdir

Clarify Dir.chdir definition