Action View, Active Record and Active Storage use the 'What is
FRAMEWORK?' title for the framework introduction, the other frameworks
use 'Introduction'. The 'What is' form is more descriptive and better
for SEO.

This change makes the titles more consistent by using the 'What is
FRAMEWORK?' title for the other frameworks.

Use the full rails commands instead of the shortcuts in the guides.
This makes things clearer for new users.

Some bash command examples were missing the $ sign.

Co-Authored-By: NHirofumi Wakasugi <baenej@gmail.com>

- Added guidance on issues with webpacker (making actiontext more beginner friendly)
- Clarify confusion about whether `content` attribute in database is needed.

- This was breaking the code highlight in the doc

Seems that is the reason not to work code highlight.

This broke the markup.

Some code examples were missing the language used for code highlighting.

- I'm hoping to get this change accepted even though this flag was
  introduced years ago in 6576f735

  My use case is the following:

  We were never enforcing belongs to association and we have a lot
  of models that implicitely declare an association as optional.
  We are now changing all our models to make associations required
  by default.
  Since we have a lot of models (more than 1000), I'd like to
  progressively enable them to use the `belongs_to_required_by_default`
  flag.

  The problem is that this flag is a mattr_accessor and doesn't to be
  set per model. We basically need to modify all our models (which
  could take years) before being able to modify the global flag.

  I'd like to change this flag to a class_attribute to solve the
  issue.

Replace SyntaxHighlighter with prism.js. SyntaxHighlighter does not seem
to be maintained. Prism.js seems a nice alternative with support for
Ruby, javascript, erb and yaml. Prism.js uses the MIT License.
https://github.com/PrismJS/prism

For bash a customized definition of the bash+shell-session themes is
used with the following comamnds  added commands:
brew, bundle, cat, git, gem, rackup, rake, rails, ruby, rubocop and
  yarn

The Active Record Query Interface missed the first title (most other
guides do have it, including the other AR guides).

The explanation about database compatibility seems more in place above
the guide's code example usage.

The javascript directory under app/ is in a singular form (app/javascript) but the documentation was mentionning it in the plural form (app/javascripts).

* Keep consistent verb tenses

[ci skip]

* Add link to "creating your own events"

[ci skip]

* Move section on how to subscribe to events above list of events

The list of events is really long, and most people only care about a
specific event or type of event.

[ci skip]

Using words such as 'just', 'simply' and 'easy' implies to the reader
that the tasks they are trying to accomplish are tasks that anyone can
do, which might then frustrate them if they find it difficult to
complete.

This commit rephrases some usage of these words to aid understanding in
the readers without making them feel belittled.

[ci skip]

[ci skip]

Add a yellow "NOTE" block to see if the guide looks better.

= This feature existed back in 2012 https://github.com/rails/rails/commit/5e7d6bba79393de0279917f93b82f3b7b176f4b5
  but got reverted with the incentive that there was a better approach.
  After discussions, we agreed that it's a useful feature for apps
  that have a really large set of routes.
Co-authored-by: NYehuda Katz <wycats@gmail.com>

I added myself links to the Ruby on Rails Tutorial years ago, after
meeting Michael in a RailsConf.

By then, the book was a commercial product, but had a free online
version and I thought it could be a good resource complementing the
official documentation.

Nowadays, only a few sample chapters are available for free, and I
don't consider these links to be fair with the rest of commercial
books about Rails anymore.

This reverts commit 5bbb2a65, reversing
changes made to f9e4906c.

Reason: Since #36866, we use `azure-storage-blob` gem. So the original
description is correct.

`unknown_asset_fallback` defaults to `false`.
Refere to 6813b480.

- remove #print_boot_infornation method and method call

This change will allow subscribers to the notification to report on anything related to the request that they might need

* https://github.com/guard/listen/releases/tag/v3.2.0
* https://github.com/guard/listen/issues/465
* `listen` removed the unmaintained `ruby_dep` dependency, which
  incorrectly shows warnings when running on TruffleRuby.

Sync style with Basic Authentication and Digest Authentication headers.