Store FlashHashes in the session as plain hashes rather than custom objects with unstable class names and instance variables.

Refactor FlashHash to take values for its ivars in the constructor, to pretty up FlashHash.from_session_value.

Remove stale comment on FlashHash: it is no longer Marshaled in the session so we can change its implementation.

Remove blank lines I introduced in controller/test_case.rb.

Unit tests for FlashHash#to_session_value.

Put in a compatibility layer to accept FlashHash serializations from Rails 3.0+.

Test that Rails 3.2 session flashes are correctly converted to the new format.

Remove code path for processing Rails 3.0 FlashHashes since they can no longer deserialize.

Fix session['flash'] deletion condition: it will never be empty?, it will either be nil or a hash with 'discard' and 'flashes' keys.
AR::Base.becomes should not change the STI type

If you want to change the STI type too, use AR::Base.becomes! instead
Fix broken link in Active Record Query Interface guide
Add test to ensure preloading works as expected with "select" and "includes".

This didn't work in rails 3.1. See #2303 for more information and original pull request.
make ActionMailer::QueuedMessage autoloadable
Merge pull request #8259 from senny/make_queued_message_autoloadable

make ActionMailer::QueuedMessage autoloadable
Point user to strong_parameters as the new protection model [ci skip]
Merge pull request #8260 from sauliusg/improved_deprecation_notice

Point user to strong_parameters as the new protection model [ci skip]
cleanup, remove whitspace from railties CHANGELOG
require bundler groups to include rake-tasks in engines

If you generate a full engine, this will include rake tasks from
your gem under the `app` namespace. For example if you have a dependency
on `rspec-rails` in your engine's `gemspec`. You will get the task `app:spec`

Closes #8229
Merge pull request #8258 from kommen/eager_loading_with_select_test2

Add test to ensure preloading works as expected with "group", "select" and "includes".
Ensure ordering to make the test pass with postgresql
Revert "Merge pull request #4575 from carlosantoniodasilva/remove-test-pending"

This reverts commit 1620df78dff527b4fa3f7b204fa05d1b630aae17, reversing
changes made to 2d000328dfc0d4b297fb4bdcebc9af6c2fb559dc.

Conflicts:
	activesupport/CHANGELOG.md
	activesupport/lib/active_support/test_case.rb
Properly deprecate #pending from AS::TestCase

Check https://github.com/rails/rails/pull/4575#issuecomment-5765575.
Merge branch 'deprecate-pending'

Properly deprecate #pending from AS::TestCase. This has been previously
removed from master, and is now back with a deprecation instead, to avoid
people having tests breaking when upgrading an app.

Please check #4575 for more background.
Add rename_index to change_table.
Merge pull request #8266 from CvX/index_rename

Add rename_index to change_table.
Merge pull request #3023 from Tho85/preserve_sti_type

AR::Base.becomes should not change the STI type

Conflicts:
	activerecord/CHANGELOG.md
displaying error message(p tag was missing) and adding output as comment 
Fix rails db command with sqlite3 database

When using sqlite3 it was attempting to find the database file based on
Rails.root, the problem is that Rails.root is not always present because
we try to first manually load "config/database.yml" instead of loading
the entire app, to make "rails db" faster.

This means that when we're in the root path of the app, calling "rails db"
won't allow us to use Rails.root, making the command fail for sqlite3
with the error:

    ./rails/commands/dbconsole.rb:62:in `start':
      undefined method `root' for Rails:Module (NoMethodError)

The fix is to simply not pass any dir string to File.expand_path, which
will make it use the current directory of the process as base, or the
root path of the app, which is what we want.

When we are in any other subdirectory, calling "rails db" should work
just fine, because "config/database.yml" won't be found, thus "rails db"
will fallback to loading the app, making Rails.root available.

Closes #8257.