Make  tests pass with umask

Remove Unused Route Reloading Code

Since the environment is initialized each time rake is run, routes don't need to be re-loaded. https://github.com/rails/rails/pull/6461#r869953

Fix #5797. Error calling dup method on AR model with serialized field

Fix logs name consistency.

This reverts commit 5559a2ae.

Reason: These are for selecting multiple objects and there isn't a need
to club them with the selecting single objects section, as discussed
with the author.

This reverts commit 724d6fa6.

Reason: This is already documented in another section, albeit without
the arguments examples. Let's add them in another commit in the
appropriate sections

[ci skip]

Add a railtie's changelog entry about runner hook.

Some of the warnings removed from "railties"

Fix human attribute_name to handle deeply nested attributes

True, False, and Nil should be represented in as_json as themselves.

[Guides] refactor rakefile to have a :guides namespace and a task that shows help

  Assertions on file permissions only pass with some combinations of
file create mode and the process file mode creation mask. This mask
should be applied on the file create mode before related assertions.

(Try again) Fix #5847 and #4045.

JRuby return different Array for module contents.

Test was failing against JRuby. 

It loads like [Constant3 Constant1]

Exceptions like Interrupt & NoMemoryError should not be rescued in tests.