This is leftover from when `render nothing: true` rendered blank string.

Fix Typo in EagerLoadPolymorphicError [ci skip]

Includes HABTM returns correct size now

fix typo in `db:purge` description [ci skip]

[ci skip] Aline code examples in AR changelog

raise `ArgumentError` when `SECRET_KEY_BASE` is an integer

If `SECRET_KEY_BASE` or other `secret` gets passed as other then string
we need to raise `ArgumentError` to know that it's a wrong argument.

Closes #22072

This reverts commit 60c97012, reversing
changes made to 6a25202d.

Reason: Broken build

Fix InheritanceTest#test_scope_inherited_properly implementation bugs

This triggers the JoinDependency work to reflect on the associations
and trigger an error as follows:

  ActiveRecord::ConfigurationError: Association named 'account' was
  not found on Company; perhaps you misspelled it?

Fix Company.of_first_firm joins association name

Should be `Company.joins(:accounts)` not `Company.joins(:account)`.

Do the same for Client.of_first_firm

Errors can be indexed with nested attributes

Close #8638

Edits default `config/boot.rb` to match what's generated by Rails 4.2.

Explicitly exit with status "1" for create and drop failures

Make `Module#redefine_method` to keep method visibility

Before this commit `Module#redefine_method` always changes
visibility of redefined method to `public`.
This commit changes behavior of Module#redefine_method` to
keep method visibility.

Do not omit parentheses [ci skip]

Tweaked wording used in some tests.

fix rdoc markup [ci skip]

Remove JRUBY_OPTS from .travis.yml file

Remove skip on tests that have been fixed.

Guard clause for id_kind in generator

Also move the method to the right class

Fix punctuation [ci skip]

Catch invalid UTF-8 querystring values and respond with BadRequest