Fix problem with accessing deprecated constant proxy's subclass

Ruby 2.4 has native `Regexp#match?`.

https://ruby-doc.org/core-2.4.0/Regexp.html#method-i-match-3F

Related #32034.

Just cleaning up the formatting of the example code here to format an inline bit of commentary as a comment.

Before:

![](https://monosnap.com/file/Clso8IQGOWHU3o6cStbY5NaMPx3ysP.png)

After:

![](https://monosnap.com/file/QdbKKvLAeiQ0RucppVYETvaWEstnOI.png)




[ci skip]

To be removed in Rails 6.0 (default for the deprecate helper).  Code
moved around as well for the ActiveSupport::Deprecation modules, since
it was dependent on ActiveSupport::Inflector being loaded for it to
work.  By "lazy loading" the Inflector code from within the Deprecation
code, we can require ActiveSupport::Deprecation from
ActiveSupport::Inflector and not get a circular dependency issue.

This basically reverts 8da30ad6

This reverts commit 3420a145, reversing
changes made to afb66a5a.

Erubi offers the following advantages for Rails:

* Works with ruby's --enable-frozen-string-literal option
* Has 88% smaller memory footprint
* Does no freedom patching (Erubis adds a method to Kernel)
* Has simpler internals (1 file, <150 lines of code)
* Has an open development model (Erubis doesn't have a
  public source control repository or bug tracker)
* Is not dead (Erubis hasn't been updated since 2011)

Erubi is a simplified fork of Erubis that contains just the
parts that are generally needed (which includes the parts
that Rails uses).  The only intentional difference in
behavior is that it does not include support for <%=== tags
for debug output.  That could be added to the ActionView ERB
handler if it is desired.

The Erubis template handler remains in a deprecated state
so that code that accesses it directly does not break.  It
can be removed after Rails 5.1.

The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.

Where appropriate prefer the more concise Regexp#match?, String#include?,
String#start_with?, and String#end_with?

- Followup of https://github.com/rails/docrails/commit/10bc49710b7205a6172c3e072b3c77114fefd952

[ci skip]

We have `caller_locations`, so we don't need to parse the strings in the
callstack.

[Robin Dupret & Shunsuke Aida]

* Fix a few typos
* Wrap lines to 80 chars
* Use `+` instead of `<tt>`

Fix a typo in rdoc (*expect* for *except*)

ActiveSupport::Deprecation is now a class rather than a module. You can
get instance of ActiveSupport::Deprecation calling #instance method.

  ActiveSupport::Deprecation.instance

But when you need to get new object od ActiveSupport::Deprecation you
need to just call #new.

  @instance = ActiveSupport::Deprecation.new

Since you can create a new object, you can change the version and the
name of the library where the deprecator concerned.

  ActiveSupport::Deprecation.new('2.0', 'MyGem')

If you need use another deprecator instance you can select it in the
options of deprecate method.

  deprecate :method, :deprecator => deprecator_instance

Documentation has been updated.

test local deprecation

deprecator object

Test ActiveSupport::Deprecation when included

In AS, only inflector/methods is need in proxy_wrappers.rb, as well as date, date_time, and time conversions.rb. This fixes an issue when requiring json and AS saying that i18n is also required.
Signed-off-by: NSantiago Pastorino <santiago@wyeworks.com>