By default `config.assets.raise_runtime_errors` should be set to `true` in development for new apps.

Source: https://github.com/rails/sprockets-rails/pull/100

Telling somebody that "precision sets the precision" is not very helpful.
Newbies want to know what precision is *for*, likewise with scale.

So I've added a very brief description for each.

This reverts commit 293a1a68.

Example code does not run yet with beta1.

This reverts commit 41ba51f4.

[ci skip]

This reverts commit f4804faf.

[ci skip]

This reverts commit 427db6b9.

[ci skip]

This reverts commit b58f3a64.

Reason: Discussion in https://github.com/rails/docrails/commit/b58f3a641795e1777aa3e12a853c34ff512acfb9

[ci skip]

Add information about 'available_locales' and 'enforce_available_locales'
to the configuring guide.

Closes #13202. [ci skip]

Discuss Action Pack's new CSRF protection from remote script tags and what it means for your app. In short, update your tests if they don't already use the 'xhr :post' style.

Thanks to @homakov for sounding the alarm about JSONP-style data leaking

* Added release notes for secrets.yml and mentioned it in the highlights
* Added release notes for Mailer previews and mentioned it in the highlights
* Added release notes for Module#concerning
* Removed mention for AV extraction from the highlights
* Rearranged the major features to put highlighted features first
* Various improvements and typo fixes

[ci skip]

This change was necessary because the whitelist wouldn't work.
It would be painful for users trying to update their applications.

This blacklist intent to prevent odd bugs and confusion in code that call mutator
methods directely on the `Relation`.

As discussed with @fxn the release notes are a snapshot document.
The links going out to the API should represent that exact snapshot.
This means we always link to the full final release. For example
the 3.2 release notes link to http://api.rubyonrails.org/v3.2.0.

/cc @chancancode

Follow up to: https://github.com/rails/rails/commit/828a8f214535e59d709fd4862605902d1cc21632#commitcomment-4879462

This will be available after https://github.com/jonleighton/spring/commit/c6e25804b3338959d87a29f40967a333c650c031
is released.

This is not a valid URL.

[ci skip]

Encapsulate url that was including the trailing quote and colon.

Added `absence` parameter to table in section `5.1.2 Error Message Interpolation`.

The flag will be used in multiple places to check for errors during runtime if enabled.

Source:  https://github.com/rails/sprockets-rails/pull/100