Removed duplicate test cases for template execution

Apply Active Record suppression to all saves

It was not being applied to creates and updates attempted through the
non-bang save methods. This means that, for example, creation of
records for singular associations through the `create_*` methods was
not appropriately ignored in .suppress blocks.

Also add a CHANGELOG entry for #18587

[ci skip]

Allow configuration of ActionMailer queue name

The `GetIp` class doesn't need to keep a reference to the middleware, so
there is no reason to pass the middleware instance to the `GetIp` class

[ci skip] fix the `collection.clear` guide

Improve the guide about `has_many` `collection.clear` to indicate
the behavior for each dependent strategy according to
`collection.delete_all`.

Based on #17179, I changed the `collection.delete` docs to also
clarify the default strategy for each `hm` and `hm:t` associations.

Fixes #20170.

This reverts commit a9d58c77, reversing
changes made to 041c2c87.

Reason: The old behavior is how it was working in previous version of
Rails since 4.0.x so it is not safe to backport to a stable branch.

See https://github.com/rails/rails/issues/19626#issuecomment-89862258
and https://github.com/rails/rails/pull/15050#issuecomment-45333449

Fix regression in #20017 wrong number of arguments error

set engine's route in the functional test is generated in the engine

Fix postgresql DISTINCT requirement in pluck test

Use block variable instead of global

```ruby
require 'benchmark/ips'

Benchmark.ips do |x|
  x.report("$&") {
    "foo".sub(/f/) { $&.upcase }
  }
  x.report("block var") {
    "foo".sub(/f/) {|match| match.upcase }
  }
end

```

```
Calculating -------------------------------------
                  $&    48.658k i/100ms
           block var    49.666k i/100ms
-------------------------------------------------
                  $&    873.156k (± 9.3%) i/s -      4.331M
           block var    969.744k (± 9.2%) i/s -      4.818M
```

It's faster, and gets rid of a few "magic" global variables

Add documentation for QueueAdapter::queue_adapter

Removed use of mocha from railties actions_test

Use sprockets-rails from github repo

See #20397

Fixed typos in rails guide

Have Bearer be valid as well

Allow Enumerable#pluck to take a splat.

Deprecate `assert_template` and `assigns()`.

Move expectation to instance level.

Fix a range of values for parameters of the Time#change

Fix circular import warning on build

Map :bigint as NUMBER(19) sql_type by using `:limit => 19` for Oracle

Use --no-document option instead of --no-rdoc and --no-ri option

since NUMBER(8) is not enough to store the maximum number of bigint.
Oracle NUMBER(p,0) as handled as integer
because there is no dedicated integer sql data type exist in Oracle database.

Also NUMBER(p,s) precision can take up to 38. p means the number of digits, not the byte length.
bigint type needs 19 digits as follows.

	$ irb
	2.2.2 :001 > limit = 8
	 => 8
	2.2.2 :002 > maxvalue_of_bigint = 1 << ( limit * 8 - 1)
	 => 9223372036854775808
	2.2.2 :003 > puts maxvalue_of_bigint.to_s.length
	19
	 => nil
	2.2.2 :004 >

Update documentation for QueueAdapters::lookup [ci skip]