- And move the Active Job related section down. Otherwise it was
  appearing as if the options are available for the `delivery_job`
  setting.

This is a partial revert of #26182. There is no reason to change the
default value.

Add support for multiple encodings in String.blank?

`assert_changes` should always assert some change

Currently reflections keeps the order when first added even if when
redefining association. As a result of the order, redefining through
association which use newly added association will raise
`HasManyThroughOrderError`. We need to redefine reflection order as well
when redefining association.

Fixes #31068.

Refactor tests for request parameters to use more realistic setup

This method which is used only in the internal was introduced in
ac384820 and was renamed in #17579. It does not need to be exposed.

An empty string is an invalid value in Ruby's range class.
So need to handle `Float::INFINITY` as it is and cast it in
`encode_range`.

Fixes #31612

Move `config.action_view.cache_template_loading` to proper section in configuring.md [ci skip]

Add bulk alter support for PostgreSQL

Remove dormant check

Use `count(:all)` in HasManyAssociation#count_records

fix the dirty tracking code's save hook overwriting missing attribute…

Seems some tests not work with Minitest 5.11.0.

* https://travis-ci.org/rails/rails/jobs/323997512#L1053
* https://travis-ci.org/rails/rails/jobs/323997486#L1055

Ref: https://github.com/seattlerb/minitest/issues/729

Improves 049a3374:

* Attempt native `preventDefault()` before stepping in
* Fix that calling `preventDefault()` more than once would throw an error
* Fix that non-cancelable events could be canceled

Follow up of #31606.

This is a regression test for #27864.

This method was introduced in #26718, which is internally used only in
`CollectionAssociation`. There is no need to be in the reflection
classes.

Refactor delegating `join_primary_key` instead of `join_keys` and `association_primary_key` in `TableMetadata`

Because `join_primary_key` is called by `join_keys` and it is to
abstract calling `association_primary_key`.

Bump license years for 2018

Clarify that it's public API and may be used in third-party analyzers.

Clarify that it's public API intended for use by third-party previewers. It shouldn't be removed without deprecation even though it isn't used by the built-in previewers.

Bugfix foreign key replacement in inverse association

Duration created with no parts will have a default seconds part eqaul to 0

Fixes analyzing an SVG image without an XML declaration. ImageMagick occasionally looks to the extension when it can't discern the type of an image file from its contents.

References #31356.

Fix recreating partial indexes after alter table for sqlite

Clarify that config.eager_load controls eager loading [ci skip]

Before Rails 4.0, `config.cache_classes` determined whether application
code was eager loaded. The `config.eager_load` option was introduced to
allow the two behaviours to be configured independently, but this
documentation was never updated to reflect that change.

We can't replace existing SELECT list as long as having DISTINCT, it
will cause incorrect result.

And also, PostgreSQL has a limitation that ORDER BY expressions must
appear in select list for SELECT DISTINCT.

Therefore, we should not replace existing SELECT list when using
DISTINCT.

Fixes #29779.