[ci skip] Fix a typo in the doc of MessageDelivery
Merge pull request #16767 from y-yagi/fix_message_delivery_doc

[ci skip] Fix a typo in the doc of MessageDelivery
ActiveJob: Implemented enqueue_at for QueueClassic
Merge pull request #16672 from cristianbica/queue-classic-later

ActiveJob: Implemented enqueue_at for QueueClassic
Leave all our tests as order_dependent! for now

We're seeing too many failures to believe otherwise.

This reverts commits bc116a55ca3dd9f63a1f1ca7ade3623885adcc57,
cbde413df3839e06dd14e3c220e9800af91e83ab,
bf0a67931dd8e58f6f878b9510ae818ae1f29a3a, and
2440933fe2c27b27bcafcd9019717800db2641aa.
[ActiveJob] TestCase (Will squash before merge)
Merge pull request #16724 from seuros/testcase

[ActiveJob] TestCase
Add and Remove string/strip require

Method .strip_heredoc is defined in
active_support/core_ext/string/strip.rb so we need to require it.

[fixes #16677]
Merge pull request #16770 from arthurnn/add_string_strip_require

Add and Remove string/strip require
Remove '*' which doesn't work

I found an * does not work in Markdown notation. It should be removed.
Merge pull request #16772 from satoryu/master

Remove '*' which doesn't belong [ci skip]
Clarify Rails uses erubis not stdlin ERB. [ci skip]
Merge pull request #16773 from cirosantilli/erb-erubis

Clarify Rails uses erubis not stdlin ERB. [ci skip]
Shorten ActionView::Base doc summary line. [ci skip]
Merge pull request #16774 from cirosantilli/erb-erubis2

Shorten ActionView::Base doc summary line. [ci skip]
Merge pull request #16762 from eileencodes/refactor-add_constraints-complex-loop-conditional

Refactor add_constraints complex loop conditional
Add a quick straw-man Incompatibilities section

Is this a thing we want?

Note current duplication between the `assert_select` section here, and
the corresponding release note entry... does this detail *move* from
there to here?

[ci skip]
Remove 'if exists' from drop table statement then use `table_exists?`

Since 'drop table if exists' statement does not always work with
some databases such as Oracle.
Fix failing tests in ActiveJob Adapter
Merge pull request #16778 from yahonda/if_exists

Remove 'if exists' from drop table statement then use `table_exists?`