every call to default_resources_path_names allocates a new hash, no need
to dup

this makes scope rollback much easier

just ask whether or not the route is defined

we can `super` in to the previous implementation.

we already know what helpers are path helpers, so just iterate through
that list and define the helpers with warnings

this lets us avoid hard coding a regexp for separating path and url
helpers in the clear! method.

Deprecate `*_path` methods in mailers

Remove redundant `self.` in class method calls

These are the only instances of this in the whole code base.

Prevent using String#scrub on Rubinius

Rubinius' has built-in support for String#scrub but it doesn't have yet
support for ASCII-incompatible chars so for now, we should rely on the
old implementation of #tidy_bytes.

Email does not support relative links since there is no implicit host. Therefore all links inside of emails must be fully qualified URLs. All path helpers are now deprecated. When removed, the error will give early indication to developers to use `*_url` methods instead.

Currently if a developer uses a `*_path` helper, their tests and `mail_view` will not catch the mistake. The only way to see the error is by sending emails in production. Preventing sending out emails with non-working path's is the desired end goal of this PR.

Currently path helpers are mixed-in to controllers (the ActionMailer::Base acts as a controller). All `*_url` and `*_path` helpers are made available through the same module. This PR separates this behavior into two modules so we can extend the `*_path` methods to add a Deprecation to them. Once deprecated we can use this same area to raise a NoMethodError and add an informative message directing the developer to use `*_url` instead.

The module with warnings is only mixed in when a controller returns false from the newly added `supports_relative_path?`.

Paired @sgrif & @schneems

This reverts commit f632f79b, reversing
changes made to 98c7fe87.

Closes #16343

remove unneeded test model for ActiveModel test cases.

Add implicit receiver support to `Object#with_options`

Remove @state.parent assignment on commit

use helpers.include? so we don't get any false positives

we should not be accessing internals to figure out if a method is
defined.

since helpers is a set, we can be confident about when to remove methods
from the module.

after this, we can disconnect @module from the instance

we can cache the module on the stack, then reuse it

GET request should not write to database note added. [ci skip]

Add missing test case for Array#to_sentence, collect all test cases for Object#to_param at one place and avoid repitition

This piece of code was introduced on
67d8bb96 , which was calling
`committed?` in the `transaction_state` before calling the `committed!`
method. However on 7386ffc7, the
`committed?` check was removed and replaced by a `finalized?`, which
only checks if the state is not nil. Thus we can remove that line.

Add missing test case for Array#to_sentence, collect all test cases for Object#to_param at one place and avoid repitition

Move array test files under array

[ci skip]

This fixes the broken code block rendering and indents the examples
within the parameter list.

[ci skip] fix doc typo for validates_uniqueness_of

Give password_confirmation div the "field" class in the scaffold generator "_form" partial

Fix json autoload