Allow data attributes to be set as a first-level option for form_for, so you can write `form_for @record, data: { behavior: 'autosave' }` instead of `form_for @record, html: { data: { behavior: 'autosave' } }` *DHH*

Fix just-plain-wrongness of psql auto-reconnect test.

We recommend the use of Unobtrusive JavaScript instead. For example:

  link_to "Greeting", "#", :class => "nav_link"

  $(function() {
    $('.nav_link').click(function() {
      // Some complex code

      return false;
    });
  });

or

  link_to "Greeting", '#', onclick: "alert('Hello world!'); return false", class: "nav_link"

for simple cases.

This reverts commit 3acdd652.

Observers are no longer important enough to get this configuration option called out at the top level

Reason: ActiveSupport::JSON::Variable is not used anymore internally. It
was deprecated in 3-2-stable but we reverted all the deprecation for
point releases.

See #6536 and #6546.
Conflicts:
	activesupport/lib/active_support/json/variable.rb

Full test requiring manual intervention was fine, but
w/ simulated disconnect, assertion was backward & still
passing. Was several kinds of wrong.

Reverting because it feels backward to specify a delivery to not
be performed while the e-mail is being composed. It is simpler (and
makes more sense) to delegate the responsibility to the calling code.

Revert "Merge pull request #7033 from kron4eg/master". Not a a fan at all of what this makes ERB files look like.

This reverts commit 46b8bcee, reversing
changes made to 2f58795e.

Revert "The application generator generates `public/humans.txt` with some basic data". I dont consider this something most people is going to want most of the time. If you want to add it in your own app, knock yourself out. But it doesnt belong in Rails imo

Restore "%" ERb/Erubis Trim Mode

Restoring the '%' trim mode for ERb templates, allowing for a leading percent sign on a line to indicate non-inserted Ruby code.

Do not include application.js if it doesn't exists

Rails were including 'application.js' to the pack when using
`javascript_include_tag :all` even there's no application.js in the
public directory.

add changelog for #7202

Add AS::StringInquirer#respond_to? method

Consistently with #method_missing

Make sure :environment task is executed before db:schema:load or
db:structure:load

Selecting which key extensions to include in active_support/rails
made apparent the systematic usage of Object#in? in the code base.
After some discussion in

    https://github.com/rails/rails/commit/5ea6b0df9a36d033f21b52049426257a4637028d

we decided to remove it and use plain Ruby, which seems enough
for this particular idiom.

In this commit the refactor has been made case by case. Sometimes
include? is the natural alternative, others a simple || is the
way you actually spell the condition in your head, others a case
statement seems more appropriate. I have chosen the one I liked
the most in each case.

Changing AR:CollectionAssociation#empty? to use #exists?

COUNT(*) queries can be slow in PostgreSQL, #exists? avoids this by
selecting a single record.

Remove warning: `*' interpreted as argument prefix

Passing options as the last value in an array doesn't work with form_for.
This reverts commit 61c8a4d9.

Passing options as the last value in an array doesn't work with form_for.
This reverts commit 6be564c7.

Refator route set