:bomb:
Fix typo in method description in Responder class

Fixes a typo in the description for the call class method in Responder.
Merge pull request #12728 from arunagw/aa-warnings-removed-ruby-trunk

More Warnings removed for ruby trunk
Merge pull request #12735 from linstula/fix-typo-in-responder-comment

Fix typo in method description in Responder class
Merge pull request #12733 from robin850/fix-railties-build

Fix railties build
Test with the right association
exists? is deprecated in ruby trunk [ci skip]

see here 4d4ff531b8807ee88a3fc46875c7e76f613956fb
remove warnings on ruby trunk
Merge pull request #12739 from laurocaetano/remove_warnings_for_ruby_trunk

Remove warnings on ruby trunk
Fix wrong behavior where associations with dependent: :destroy options
was using nullify strategy

This caused a regression in applications trying to upgrade.

Also if the user set the dependent option as destroy he expects to get
the records removed from the database.
Merge pull request #9660 from sebasoga/change_strong_parameters_require_behaviour

Change ActionController::Parameters#require behavior when value is empty
Merge pull request #12686 from kryzhovnik/master

Minor doc fix of ActiveModel::Naming. [ci skip]

Conflicts:
	activemodel/lib/active_model/naming.rb
Added ActiveRecord::Base#enum for declaring enum attributes where the values map to integers in the database, but can be queried by name
Revert "Merge pull request #9660 from sebasoga/change_strong_parameters_require_behaviour"

This reverts commit c2b5a8e61ba0f35015e6ac949a5c8fce2042a1f2, reversing
changes made to 1918b12c0429caec2a6134ac5e5b42ade103fe90.

See: https://github.com/rails/rails/pull/9660#issuecomment-27627493
Update guides welcome page to point to version 3.2.15 [ci skip]
Improve wording in AC::ParameterMissing error message
Fix to work on Ruby 1.9.3, example and changelog improvements
Use an already existing fixture
Added Numeric#in_milliseconds, like 1.hour.in_milliseconds, so we can feed them to JavaScript functions like getTime().
Merge branch 'master' of github.com:rails/rails