Eventually I want to eliminate the FakeSet test class

I'm going to reimplement this using route objects, so it will be easier
if we just change ast access to go through a method rather than hashes

we don't need to keep adding it and deleting if from hashes.

Eventually I want to pull up AST generation so that we don't have to add
it to the `conditions` hash.

Add method_source dependency to activesupport

We already have rake install command that does the same thing.

Remove `version` argument in install.rb

Fix middleware deprecation message. Related to #21172.

[ci skip] SQL is written using statements, not sentences

It just constructs a Path::Pattern object with the AST that it already
has

This was a useless object.  We can just directly construct a
Path::Pattern object without a Strexp object.

the caller already has it, there is no reason to pack it in to an object
and just throw that object away.

we always pass all parameters, so there is no reason to provide default
arguments.

the caller already has access to `as`, so we can stop passing it around.

the same value that is extracted from the options hash earlier is
returned, so we don't need to pass it in in the first place.  The caller
already has the data, so stop passing it around.

this way we don't have to mutate the options hash so far away from where
the user passed it in

Require explicit counter_cache option for has_many

The `anchor` parameter [is overridden](https://github.com/rails/rails/blob/b4b4a611d0eb9aa1c640c5f521c6a43bf2a65bab/actionpack/lib/action_dispatch/routing/mapper.rb#L1528) unless it
is directly passed to `match`, so setting it in a scope must be a
mistake.

Prevent duplicating `where` clauses

Closes #21201.

How to pass arguments to ActiveJob Jobs [ci skip]

A section explaining how to pass arguments to Jobs has been added.

[ci skip] How to pass arguments to ActiveJob Jobs

Removed the "how to pass arguments" from what you will know section

[ci skip] improving Enqueue Job section

Using GuestsCleanupJob rather than MyJob for coherence.

[ci skip] Passing args section merged with enqueuing jobs

Passing args is now explained through examples withing Enqueuing the Jobs section

[ci skip] Unnecessary example removed

[ci skip] Typo fixed (missing as)

[ci skip] Clarified asset pipeline guide

The latest, currently unreleased, version of queue_classic is required
for this to work. See
https://github.com/QueueClassic/queue_classic/pull/262 for more details.

Added helper methods to stub any instance

As described in the "Follow Coding Conventions" section in our
contribution guide (http://edgeguides.rubyonrails.org/contributing_to_ruby_on_rails.html#follow-the-coding-conventions)
we favor `assert_not` over `refute`.

While we don't usually make stylistic changes on it's own I opted to do
it in this case. The reason being that test cases are usually copied as
a starting point for new tests. This results in a spread of `refute` in
files that have been using it already.

Assert that the `:prefix` option of `number_to_human_size` is deprecated

Replace the giant comment in routes.rb with a link to the guides

[ci skip] Documentation: Switch around a common phrase for readability

I didn't like this method because it mutates the parameters.  Now that
the method is so small, just push it up to `initialize`

If the through class has default scopes we should skip the statement
cache.

Closes #20745.

now the `@defaults` variable doesn't need to be set before calling
`normalize_defaults`