Move as/test_test to as/test_case_test
Updated the deprecation warnings to 5.0
Ignore Postgresql "SELECT tablename FROM pg_tables" when counting queries
remove end-of-line spacing in development.rb, production.rb
Merge pull request #16579 from nsinenko/master

Remove end-of-line spacing in development.rb, production.rb
Clear deliveries in order not to affect other tests
Merge pull request #16577 from cristianbica/update-deprecation-to-5.0

Updated the deprecation warnings to 5.0
Revert "Do not gsub non ASCII characters in header anchor.".

This reverts commit 699babe.

Also change the upgrading_ruby_on_rails link back to original in 4_2_release_notes.
Merge pull request #16581 from JuanitoFatas/guides-anchor-link

Revert "Do not gsub non ASCII characters in header anchor.".
Merge pull request #16573 from zzak/test_test_to_test_case_test

Move as/test_test to as/test_case_test
Deprecated .deliver / .deliver! to .deliver_now / .deliver_now!
Updated rdoc / guides / release notes related to ActiveJob / ActionMailer