Actionpack documentation typos [ci skip]

Re. 6e098284

Fix test name

Gracefully fallback on version migrations for sqlite < 3.7.11

https://github.com/rails/rails/commit/42dd2336b31a8d98776d039a2b9fd7f834156a78 changed INSERT INTO versions to run in 1 single query.
This breaks for sqlite versions < 3.7.11, which is especially the case on Ubuntu 12.04 LTS, that has SQLite version 3.7.9 as default.

So we check for support for multi insert, before performing single query inserts, else fallback to older version of running multiple queries.
[Vipul A M & Yasuo Honda]

When the query cache completes, if Active Record is still inside of a
transaction, it is because the transaction is meant to be left open
above this unit of work (such as transactional fixtures in tests). There
were several tests around the behavior of "tests" that were invalid, as
tests are not run through the executor. They have been changed to
reflect the new behavior, which is closer to what actually occurs in
Rails tests.

Fixes #23989
Fixes #24491
Close #24500

Slight refactor to improve boot performance on some Ruby
implementations (for now).

Fix broken links in 'Ruby on Rails 3.0 Release Notes' [ci skip]

Change definition of what async means for an Active Job Job [ci skip]

- [ci skip] Active Job Async doesn't support to Async feature as per it's definition.

- [ci skip] Active Job Async doesn't support to Async feature as per it's definition.

- [ci skip] Active Job Async doesn't support to Async feature as per it's definition.

- [ci skip] Active Job Async doesn't support to Async feature as per it's definition.

Combine inequality and equality and add SQL examples [ci skip]

Actioncable and Actionpack documentation typos [ci skip]

Further investigation seems to disprove that backtracking is the
reason why the positive variant is slower, see

    https://github.com/rails/rails/pull/24658#issuecomment-213079710

so, just say nothing about it, only assert it is slower.

using rails dev:cache instead of rake dev:cache

Log if redis connection is in stale/failed state.

Without the `wdm` gem, it appears that `listen` keeps an open handle to
each of these files, causing them not to be removed when the tempdir
tries to clean iteslf up, and then directory to fail to unlink. In
addition to fixing that particular failure, we now construct OS agnostic
paths, and capture exceptions if the directory fails to unlink so that
minitest will report it rather than crash

Fix ApplicationController.renderer.defaults.merge!

Minor space bump.

use wrapper file to add rake task for engines

When you come here without context, it is important to hightlight that
checking the predicate is worthwhile due to the observation that blank
strings are often empty. So you complicate the code (which has a cost
in terms of readability and aesthetics), but statistically makes sense.

Then, you also need to explain why the second operand is so convoluted.

Otherwise, you wonder why this line is written precisely this way. That
is what code comments are for.

Remove unused `BLANK_RE`

Add #18323 to 5.0 release notes

Update delegate to use newer Ruby syntax

Revert "add doc for `:type` option of `#create_join_table` [ci skip]"

add doc for `:type` option of `#create_join_table` [ci skip]

Follow up to #24221.

This commit updates `delegate` to use the keyword argument syntax added in Ruby 2. I left the `ArgumentError` when `to` is missing, because it better explains how to correctly use `delegate`.  We could instead rely on the default `ArgumentError` that would be raised if `to` were a required keyword argument.

Fix small typos [ci skip]

`bundler` provides wrapper file to add rask tasks.
https://github.com/bundler/bundler/blob/master/lib/bundler/gem_tasks.rb

Instead of directly call method, by which require this file,
it can be used without updating of Rakefile if task has been added.

Follow up to #24658.