- Adds #each_chunk to ActionDispatch::Response. it's a method which
    will be called by ActionDispatch::Response#each.
  - Make Response#each a proper method instead of delegating to @stream
  - In Live, instead of overriding #each, override #each_chunk.
  - `#each` should just spit out @str_body if it's already set
  - Adds #test_set_header_after_read_body_during_action
    to prove this fixes #23964
  - Adds #test_each_isnt_called_if_str_body_is_written to
    ensure #each_chunk is not called when @str_body is available
  - Call `@response.sent!` in AC::TestCase's #perform so a test response
    acts a bit more like a real response. Makes test that call  `#assert_stream_closed`
    pass again.
  - Additionally assert `#committed?` in `#assert_stream_closed`
  - Make test that was calling @response.stream.each pass again by
    calling @response.each instead.

Action Cable: Return subscription object(s) when updating the collection

Fix ActionCable.Subscriptions#create

Fix partial rendering with dot in filename

When rendering a collection with a partial whose filename contains a dot, e.g.
"customer.mobile", we would set a `locals[:'customer.mobile']` variable instead
of, as in earlier versions of Rails, `locals[:customer]`.

This bug was introduced in da9038ea.

Correcting sentence in description of application.rb in ralities

Adding period in the end.

Update base.rb [ci skip]

Update Gemfile

Changes "as has to be loaded" to "as it has to be loaded"

Action Cable: client side 💅

#getConfig was implmented as general utility for reading action-cable-* meta tags (hence the `name` argument). Introduced in 8b69f1ee.

Action Cable: Defer starting connection monitor until a connection is opened

add `scaffold_stylesheet` method to guide [ci skip]

`scaffold_stylesheet` was added in #20479.

Action Cable: Establish WebSocket connection when first subscription is created

* More intention revealing than connecting on the first call to Connection#send
* Fixes that calls to Connection#send would attempt to open a connection when the WebSocket's state is CONNECTING

Forgot to update the documentation on the line just above the one
I was changing in 49331322. Well done, Kasper 👍

`ActionDispatch::SSL` redirects all HTTP requests to HTTPS, not just some.
The `constrain_to` option inverts this, so it sounds like the middleware
only handles a few requests, rather than the majority with a few routes to
opt out of the redirect.

Renaming to `exclude` matches this intent more closely.

Since f6e48148 was written we've made collection caching explicit.

Thus the documentation is outdated and needs a rewrite.

Support faye-websocket + EventMachine as an option

Closes #23934.

This is a forward port of ac832a43

Previously the scope of all associations with extensions were wrapped in
an instance dependent proc. This made it impossible to preload such
associations.

Change 'a HTTP' to 'an HTTP' [ci skip]

Niceify the dynamic routes deprecation messages

Change 'a HTML' to 'an HTML' [ci skip]

ConnectionMonitor is once again notified of disconnect

Follow-up to #23980.

- Fix grammar: "be remove" -> "be removed".

- Wrap lines at 80 chars.

Lurvely ;-)

Changed behaviour of timestamps helper by create_table migration generator [ci skip]