Currently submit_tag value translation does not support i18n key style
locale key.
It confuses me a bit because many other components support i18n key
style locale key.
I added i18n key style locale key support to submit tag.

Remove extra changelog added by #31944

Previously it was removed by #32106 since it was backported to `5-2-stable`.

[ci skip]

Prevent older versions of Chrome from appending a Content-Type header containing the Blob type, rendering the request invalid if we intend not to provide a Content-Type. This behavior was observed in Chrome 58.

delegate to, with private: true option

Actually `reflection.klass` should be valid AR model unless
`polymorphic?`. Previously it worked limitedly by ignoring `NameError`
even if `reflection.klass` is invalid, and our isolated testing depends
on the limited working.
Probably we should also check the klass validity in `check_validity!`
properly. Until that time, I restored the error suppression for now.

Closes #32113.

See 948b9319 for context

Currently the place where we limit what gets sent to the database is in
the implementation for `partial_writes`. We should also be restricting
it to column names when partial writes are turned off.

Note that we're using `&` instead of just defaulting to
`self.class.column_names`, as the instance version of `attribute_names`
does not include attributes which are uninitialized (were not included
in the select clause)

Fix customizing the download Content-Type for a directly-uploaded blob via a signed URL. See e8286ee2.

Since #31895, build of 2.5 and AR combination failed.
https://travis-ci.org/rails/rails/jobs/346064349#L1638

It seems to be the reason that model is not loading properly, so I added
require. But I'm not sure if this is correct

Remove changelogs for Rails 6.0 since they were backported to `5-2-stable`

[ci skip]

Remove railties' changelog added by 7340596d
since it was backported to `5-2-stable` via ac99916f

Remove activesupport's changelog added by 1077ae96
since it was backported to `5-2-stable` via a2b97e4f

Remove activesupport's changelog added by 0d41a76d
since it was backported to `5-2-stable` via cdce6a70

Remove activestorage's changelog added by d57c52a3
since it was backported to `5-2-stable` via 5292cdf5

Follow up c113bdc9

Follow up of 6d63b5e4.

Make `reflection.klass` raise if `polymorphic?` not to be misused

This is an alternative of #29722, and revert of #29601 and a1fcbd97.

Currently, association creation and normal association finding doesn't
respect `store_full_sti_class`. But eager loading and preloading respect
the setting. This means that if set `store_full_sti_class = false`
(`true` by default), eager loading and preloading can not find
created polymorphic records.

Association creation and finding should work consistently.

Since #32034, Rails 6 requires Ruby 2.4.1+.

Use lazy load hook to configure ActiveStorage::Blob

`to_prepare` callbacks are run during initialization; using one here
meant that `ActiveStorage::Blob` would be loaded when the app boots,
which would in turn load `ActiveRecord::Base`.

By using a lazy load hook to configure `ActiveStorage::Blob` instead,
we can avoid loading `ActiveRecord::Base` unnecessarily.

Update default HSTS max-age value to 1 year

Closes #32096.

`content_security_policy_nonce_generator` specifies request as an argument when calling.
https://github.com/rails/rails/blob/ddb7da8535b07f51b7a8f5e3062cc8ffbd4ff23b/actionpack/lib/action_dispatch/http/content_security_policy.rb#L100

So without this fix, will raise `ArgumentError` when start server.

Correct method documentation

Improve generated file `app/assets/javascripts/application.js` of plugin

Add `//= require rails-ujs`

Closes #32094

Fixes #31909.
Closes #31911.

The callback parameters need to reflect changes after
https://github.com/rails/rails/pull/28800

* Add test case for open-ended range.
* Add test case for numeric range for string column.

BC dates are supported by both date and datetime types.

https://www.postgresql.org/docs/current/static/datatype-datetime.html

Since #1097, new datetime allows year zero as 1 BC, but new date does
not. It should be allowed even in new date consistently.

The values infinity and -infinity are supported by both date and
timestamp types.

https://www.postgresql.org/docs/current/static/datatype-datetime.html#DATATYPE-DATETIME-SPECIAL-TABLE

And also, it can not be known whether a value is infinity correctly
unless cast a value.

I've added `QueryAttribute#infinity?` to handle that case.

Closes #27585.

Since #32028, Rails 6 requires Ruby 2.3+.
No longer needed workaround for Ruby 2.2 "private attribute?" warning.

Use `rubocop-0-52` channel

Since https://github.com/rails/rails/pull/32091 expects RuboCop 0.52.1

Update rubocop to the latest version

Includes [Switch Layout/SpaceBeforeBlockBraces's empty braces default](https://github.com/bbatsov/rubocop/pull/5263) from [0.52.1](https://github.com/bbatsov/rubocop/blob/master/CHANGELOG.md#0521-2017-12-27).

Before: 131 offenses detected.

After: no offenses detected

Fix plugin generated files