A warning line should look like a warning section

[ci skip]
[ci skip] Add Doc of with_options for the case when inherited default options and original options have same keys
Clarify `#update_all` doc about value processing

This clarify the fact that `#update_all` doesn't type-cast passed
values and that these values are written as-is in the SQL DB.

Fix #17242

[ci skip]
Add #key? to ActiveModel::Errors

Mirror Ruby's Hash#key?
Merge pull request #17252 from Bounga/update_all_doc_clarification

[ci skip] Clarify `#update_all` doc about values processing
Merge pull request #17253 from gshutler/activemodel-errors-key

Add #key? to ActiveModel::Errors
Improve Journey compliance to RFC 3986

The scanner in Journey fails to recognize routes that use literals
from the sub-delims section of RFC 3986.

This commit enhance the compatibility of Journey with the RFC by
adding support of authorized delimiters to the scanner.

Fix #17212
ActionController::InvalidCrossOriginRequest fails with 422 instead of 500
Fixes #15967
Merge pull request #17220 from Bounga/fix_journey_rfc_3986_compliance

Improve Journey compliance to RFC 3986
Use `#tr` instead of `#gsub`

`#tr` is more efficient than `#gsub` and can be used as a drop in
replacement in this context.
break cache if we're inside a "scoping" call. fixes #17052

For now, we don't want to take "scoping" calls in to account when
calculating cache keys for relations, so just opt-out.
make sure cache is not used for collection assocations too

follow up for #17052
:scissors: duplicated `require`s
Make the config actually copyable

The intention here is to make the required config copy-able from the console/logs, so add a newline at the end of the message to make that easier. (Otherwise it would be `... raise_in_transactional_callbacks = true (called from...`.)
delete leftover JoinOperation struct
Add ActiveJob to "Welcome to Rails" section

[ci skip]
Link to ActiveModel’s README in "Welcome to Rails"

A link to the README of each module is included in "Welcome to Rails",
only ActiveModel (and ActiveJob, see #17264) are missing.

[ci skip]
Remove broken http://tore.darell.no link

Replace with Twitter account, unless @toretore has a better
suggestion :ear since http://tore.darell.no returns 404.

[ci skip]
Raise an error for has_one associations which try to go :through a polymorphic association [#17263]
specify protocol for external links

to ensure correct parsing result of rdoc