This reverts commit 5be94ced.

Reason: This commit is incorrect.

Remove ruby_debugger_gemfile_entry from app_base

Generate strict validation error messages with attribute name

Build fix when running isolated test

Html escape once

All the logic is based on the HTML_ESCAPE constant available in
ERB::Util, so it seems more logic to have the entire method there and
just delegate the helper to use it.

Improvements on some url helper methods and tests

Added as_json method for multibyte strings

Remove ruby_debugger_gemfile_entry from app_base, we can just put ruby-debug19 commented directly in Gemfile

warning removed: mismatched indentations

This reverts commit 5cad7a0d, reversing
changes made to bb842e8d.

Added `none` query method to return zero records.

Re-launch assets:precompile task using original $0 if $0 is batch file so it works on Windows

Set the timezone correctly for a test in activerecord/../base_test.rb

Test and fix for issue 4718

And added NullRelation class implementing the null object pattern for the `Relation` class.

Remove slash from favicon_link_tag method attribute

Refactor select helper and remove eval

reflection test fixed

Remove deprecation warnings from tests

Fix GH #4744. Don't run bundle install when executing `rails new app` with --pretend option

Fix typo in routing documentation