since we are now passing the format value around, we can remove it from
the options hash, which means we don't need to consult as many values
from IGNORE_OPTIONS

Refactor quoting of binary data to not be based on the column type

Respect limit for PG bit strings

Refactor determination of whether the field has changed

The types know more about what is going on than the dirty module. Let's
ask them!

That data is internal to Active Record. What we care about is that
new records have the right default value.

/cc @sgrif

fix polymorphic? method and reuse it

Fix polymorphic to check for `options[:polymorphic]` instead of
`options.key? :polymorphic` and then reuse the method `polymorphic?`
method instead of constantly checking the same `options[:polymorphic]`.

before this change, we were allocating AS::SafeBuffer objects that were
being interpolated in to a string, so the safe buffer object was being
thrown away.  This change only allocates a string (vs a string *and* a
safebuffer) and interpolates the string.

On my test application, this reduced the AS::SafeBuffer objects from
1527k per request to about 500 per request.

html_escape_interpolated_argument is only used in mutation methods:

  https://github.com/rails/rails/blob/c07d09559ec171e1904b55c7ad7e8c7d586ca51b/activesupport/lib/active_support/core_ext/string/output_safety.rb#L174
  https://github.com/rails/rails/blob/c07d09559ec171e1904b55c7ad7e8c7d586ca51b/activesupport/lib/active_support/core_ext/string/output_safety.rb#L179

The return value doesn't need to be converted to an AS::SafeBuffer since
we know that the current object is an AS::SafeBuffer and will be
mutated, and the return value from html_escape_interpolated_argument
will be thrown away

Remove unused `initialize_attributes` method

Fix typo in ActionController Overview

* Should say "sensitive" instead of "sensible"

File.exist? instead of File.exists? in bin/setup

Add missing colon to internal [ci skip]

This was previously a hook for a special case related to `serialize`,
which has since been removed.