avoiding calling of #option_value_selected? two times

`delgated` => `delegated`

Better error message for typos in assert_response argument.

This commit makes it really easy to debug errors due to typos like
"assert_response :succezz".

Added `rewhere` usage to AR querying guides

Raise RuntimeErrors with inspectable and MRI-independent messages.

Conflicts:
	activesupport/lib/active_support/core_ext/hash/deep_merge.rb
	activesupport/lib/active_support/core_ext/hash/keys.rb

Updated allow_failures for Rubinius 2.2.1.

Rubinius Gemfile and travis fixes

Before Rubinius 2.2.0, some parts of the stdlib were lazily loaded, even
if not included in the Gemfile. Now it's 100% required to include the
gem 'rubysl', otherwise the stdlib is not available entirely, breaking
everything.

Also, the rubysl-test-unit gem was depending on minitest ~> 4.7, thus causing
conflicts with Rails's dependency on minitest 5. That is not the case
anymore since rubysl-test-unit 2.0.2, so it is completely safe to
include it fully.

When Travis is going to update RVM to 1.24, it'll be safe to use rbx-2,
thus picking new versions automatically.

Previous behaviour was MRI-dependent, now we're making sure the message
is correctly shown: something that can be relyied upon across every
Ruby implementation.

Test for when controller with skip-assets

Added test when task generator called on revoke

Helper should be a module in Rails guides [ci skip]

Using activerecord-jdbcsqlite3-adapter

Cleaned up app generator test

PluginGeneratorTest needs to have
activerecord-jdbcsqlite3-adapter to pass under JRuby

Don't call #as_json on children of Array and Hash with nil when no arguments are passed

Fix validation on uniqueness

should also call #as_json on the children without options (instead of
nil)

Since we are using assert_no_match, if we change the code before
changing the tests, the tests will still pass and the assertion will
become useless

Fix the assertion for not inclusion of turbolinks on application.js.

We were asserting if `//= turbolinks` was not present while the correct is
asserting that `//= require turbolinks` is not present.

Also make Action Mailer changelog format more consistent with the
others [ci skip]

Build fix for new routing inspector changes

Broken by

6701b4cf

Added a missing close parenthesis to i18n.md

Option to skip turbolinks