Use a single loop in ActiveSupport:FileUpdateChecker#max_mtime 

Railties CHANGELOG Pass [ci skip]

Add `config` to the deprecation warnings of deprecated config options

speed up ActiveModel::Dirty#attribute_changed?

Encourage best practice in the HTTP Token authentication example code

Benchmark results:

Warming up --------------------------------------
            old code    32.176k i/100ms
            new code    34.837k i/100ms
Calculating -------------------------------------
            old code      1.595M (± 3.5%) i/s -      7.947M
            new code      1.942M (± 3.9%) i/s -      9.685M

[ci skip] This modifies the HTTP Token authentication example's `authenticate` method, to use the `secure_compare` method with two constant-length strings. This defends against timing attacks, and is best practice. Using `==` for sensitive actions is not recommended, and this was the source of a CVE fixed in October 2015: https://github.com/rails/rails/commit/17e6f1507b7f2c2a883c180f4f9548445d6dfbda

Clean up all Rails 5 warnings. Revert auto-added periods.

- we are ending sentences properly
- fixing of space issues
- fixed continuity issues in some sentences.

Reverts https://github.com/rails/rails/commit/8fc97d198ef31c1d7a4b9b849b96fc08a667fb02 .
This change reverts making sure we add '.' at end of deprecation sentences.
This is to keep sentences within Rails itself consistent and with a '.' at the end.

Improved ActionView flows.rb documention [ci skip]

The pass touches a few minor things.

One important aspect is that the wording treats "railtie" as a
regular noun. This is so because Railtie is a constant and
generally the text refers to "classes that act as railties",
which is different.

Railties are so fundamental in Rails that deserve a noun,
like engine, class, array, application, etc. They have a
meaning per se, beyond constants.

Also, make clear an extension's railtie does not need to
be called "Railtie" or have "Railtie" in their class name.

Idiomatically trailing hashes in method calls do not use
explicit curlies.

Cleanup message shown while running destructive action against protected database

Pass over AM changelog [ci skip]

Rake includes (an extended version of) FileUtils in tasks.
It is more idiomatic that they use this provided interface.

With the exception of what is loaded in active_support/rails,
each file is responsible for its own dependencies. You cannot
rely on runtime order of execution.

- Fixed statement about setting `config.action_mailer.default_url_options = {protocol: 'https'}` . We are just setting the protocol key to 'https', not replacing/initializing the complete config.
- Fixed grammar in assert_emails changlog
- Added sentence separator for code ":"

[ci skip]

- Added missing config to complete config names
- Fixed route generators changelog grammar.
- rake:stats => rake stats
- Fixed grammar of assert_file change
- Make sure we end all sentences

[ci skip]

Update ActionMailer Mailer Models and Views documentation [ci skip]

do not create unnecessary directory

fix typo in file path [ci skip]

Check for protected environments before trying to load structure.sql file

This was added in a4c358f8, but `config.assets` has been removed in 5172d933.
Also, do not use env path to `Sprockets::Cache::FileStore` even `sprockets-rails`.
ref: https://github.com/rails/sprockets-rails/blob/master/lib/sprockets/railtie.rb#L129

- Check for protected environments while running `db:structure:load`
  similar to how `db:schema:load` behaves.
- Followup of https://github.com/rails/rails/pull/24399.

Fix behavior of JSON encoding for Exception

generate ApplicationJob if it does not already exist

MariaDB 5.3+ supports microsecond datetime precision

We support microsecond datetime precision for MySQL 5.6.4+. MariaDB has
supported it since 5.3.0, but even 10.x versions return a compatible
version string like `5.5.5-10.1.8-MariaDB-log` which we parse as 5.5.5,
before MySQL supported microsecond precision.

Specialize our version check to account for MariaDB to fix.

Disallow calling `#deliver_later` after local message modifications.

Remove reference to non existing link in the welcome page [ci skip]

	modified:   guides/source/getting_started.md