add documentation for `ActiveSupport::Testing::SetupAndTeardown`.
Revert "Merge pull request #10566 from neerajdotname/10509d"

This reverts commit 2b817a5e89ac0e7aeb894a40ae7151a0cf3cef16, reversing
changes made to 353a398bee68c5ea99d76ac7601de0a5fef6f4a5.

Conflicts:
	activerecord/CHANGELOG.md

Reason: the build broke
Fixes AciveModel::Model with no ancestors, fixes #11004

Signed-off-by: José Valim <jose.valim@plataformatec.com.br>
Handle single quotes in PostgreSQL default column values

PostgreSQL escapes single quotes by using an additional single quote.
When Rails queries the column information, PostgreSQL returns the
default values with the escaped single quotes.

#extract_value_from_default now converts these to one single quote each.

Fixes #10881.
Merge pull request #10884 from dmarkow/pg_fix_default_quotes

Handle single quotes in PostgreSQL default column values
add forgotten CHANGELOG entry for #10884.
Fix name of nested attributes option include_id

The option to disable including a hidden ID field on a `fields_for` nested association was incorrectly documented as `hidden_field_id` instead of `include_id`
Merge pull request #11017 from stormsilver/patch-1

Fix name of nested attributes option include_id
ActiveModel::Model inclusion chain backward compatibility
`inspect` for AR model classes does not initiate a new connection.
fix "will be ran" and "has began" typos in configuration guide
Merge pull request #11024 from pdorrell/master

Fix 3 typos in Configuration guide
Merge pull request #11020 from fredwu/master-activemodel-inclusion-chain-fix-iii

ActiveModel::Model inclusion chain backward compatibility
Add bare actionview gem to the root directory

This commit creates structure for Action View gem and is first of a
series of commits extracting Action View from Action Pack.
Move actionpack/lib/action_view* into actionview/lib
ActionView version should be 4.1.0
Move template tests from actionpack to actionview
Remove unneeded files
Add actionpack as actionview's development dependency

ActionView still relies on ActionPack in some of the tests.
Remove unneeded test fixtures in AV