[Testing Guide] Mention :unauthorized in assert_response explanation [ci skip]

Require action_view to fix missing constant ENCODING_FLAG

Previously, requiring action_view/view_paths did cause an uninitialized
constant error for ENCODING_FLAG, which is defined in action_view.

Fix wordy sentence [ci-skip]

Test for skipping a controller filter set up with a class Part 3

Merge branch 'dump-schema-after-migration-flag' of git://github.com/emilsoman/rails into emilsoman-dump-schema-after-migration-flag

Conflicts:
	activerecord/CHANGELOG.md

* Add a config on Active Record named `dump_schema_after_migration`
* Schema dump doesn't happen if the config is set to false
* Set default value of the config to true
* Set config in generated production environment file to false
* Update configuration guide
* Update CHANGELOG

Follow up to https://github.com/rails/rails/commit/580f0b61dc99c6854fa930a761d28a3ab08163f7#commitcomment-5293470

/cc @chancancode

- Manually applied from #13951.
- Discussion at #13947.
- Removed trailing whitespace from https://github.com/dpmehta02/rails/commit/18044e86af93672dfc38befbe974261e87b3518d

/cc @dpmehta02

Closes #13909

fix interplay of humanize and html_escape

Sized enumerator

The rails/rails gemnasium page (https://gemnasium.com/rails/rails) is not helping much.
It lists 0 dependencies so there is not much to track. Also our gems mostly depend
on other gems we control. There is not much point in monitoring them.

The batch was introduced with #3909.

As discussed in #13940 this can be removed
We can document this somewhere else in testing guides.

Fixed typos

Fixed typos in column_definition_test.rb.

This behavior was introduced since Rails 3.1 (207f266c)
but the docs were still out of date.

[ci skip]

[ci skip] Add missing 'task' to note on Running Migrations