Use include_blank value as option label

Clarify comments about sanitized_allowed_tags

Fix description of OID in TypeMapInitializer

- Clarify that arguments are expected in array format.
- Extension of https://github.com/rails/rails/pull/17390.
- https://github.com/rails/rails/pull/17390 was targeted against
  4-1-stable branch. This commit updates master.
- [ci skip]

[ci skip]

See comment in this patch for the rationale.

References #16468

The check for circular loading should depend on a stack of files being
loaded at the moment, rather than the collection of loaded files.

This showed up indirectly in #16468, where a misspelled helper would
incorrectly result in a circularity error message.

References #16468

Fix typo in "Active Record Basics" guide. [ci skip]

@carlosantoniodasilva pointed out that when `@person` is nil then this would blow up when you ended up calling `#first`on `nil`.

> "there’s no way to break a try chain when you enter it :D"

[ci skip]

- better `if` example
- Added chaining example to the try method description
- Documented the `respond_to?` check to the try method description
- Clearer wording to explain that argument error is raised on argument mismatch to responding method, rather than to non-responding method (which is handled without exception by `try`)
- `.any?` is more precise than `! .blank?`
 - Don't need to use `try` on `children` as (for regular associations) they will always be a collection or array that responds to `first`
- Fix typos/grammar

AR Migrations Guide#Foreign Keys: fix wrong table

[skip ci]

DRY up try/try!

Secure compare

Fix error string raised from AJ enqueue_at for ClassQueueAdapter

Inline AJ around_perform and  around_enqueue in CallbackJob used for tests

Bring try! into parity with try.

Based on commit 5e51bdda.

💅 fix typos in activejob queuing test

fix small typo in routing test