The credits page is gone after #32429, these images are now orphan.

Cleanup credits related code as it is removed now in PR #32429

Remove credits.html from Rails Guides

Display db:drop description in ActiveRecord

Small doc fixes

[ci skip]

Doc fix added missing quote

[ci skip]

* refs #32420

[ci skip]

Disable ActionView::Template finalizers in test environment

ActionView::Template instances compile their source to methods on the
ActionView::CompiledTemplates module. To prevent leaks in development
mode, where templates can frequently change, a finalizer is added that
undefines these methods[1] when the templates are garbage-collected.

This is undesirable in the test environment, however, as templates don't
change during the life of the test. Moreover, the cost of undefining a
method is proportional to the number of descendants a class or module
has, since the method cache must be cleared for all descendant classes.

As ActionView::CompiledTemplates is mixed into every
ActionView::TestCase (or in RSpec suites, every view spec example
group), it can end up with a very large number of descendants, and
undefining its methods can become very expensive.

In large test suites, this results in a long delay at the end of the
test suite as all template finalizers are run, only for the process to
then exit.

To avoid this unnecessary cost, this change adds a config option,
`action_view.finalize_compiled_template_methods`, defaulting to true,
and sets it to false in the test environment only.

[1] https://github.com/rails/rails/blob/09b2348f7fc8d4e7191e70e06608c5909067e2aa/actionview/lib/action_view/template.rb#L118-L126

Make mutating params#dig return value mutate underlying params

Extract the confirm call in its own, overridable method in rails_ujs

Remove `ForeignKeys` module which was introduced at #32299

Not generate needless files in guides

Add AR::Base.base_class? predicate

Move SourceAnnotationExtractor under Rails module

Not generate needless files:

* _license.html.erb, _welcome.html.erb are partial files.
* layout.html.erb is the layout file.

To solve the problem #32299, just enough to introduce
`fk_ignore_pattern` option.

I don't think there is a need to expose these constants.

Fix typo in rails-ujs HTML content test

`</ps>` is not a valid closing tag for `<p>`.

Use consistent spacing in actionview helper docs

The spacing in these comments is fairly inconsistent. Array argument
contents are often separated with a space from the array literal
brackets but in several cases the Hash literal curly braces are tangent
to their contents which makes the documentation harder to read in some
cases.

Pass HTML responses as plain-text in rails-ujs

Change temporary file name extension while editing encrypted file.

Remove leftover blank sqlite3 file after in memory handler tests.

Move implementation of `before?` and `after?` to `DateAndTime::Calculations`

Fix two-level database configurations with URLs

Remove needless images in guides

This prevents duplication of code.

Prevent duplication of tests by moving them to `DateAndTimeBehavior`.

Related to #32185.

Deriving `secret_key_base` breaks `key_generator` defined in 5.1.

An entry in `ActiveRecord::Base.configurations` can either be a
connection spec ("two-level") or a hash of specs ("three-level").

We were detecting two-level configurations by looking for the `database`
key, but the database can also be specified as part of the `url` key,
which meant we incorrectly treated those configurations as three-level.