Also add missing entries and use the formating convention

Removed some useless docstrings and no-doc'ed some.

Logic in clone_empty method was dealing with old @dirty variable, which
has changed by @html_safe in this commit:
https://github.com/rails/rails/commit/139963c99a955520db6373343662e55f4d16dcd1

This was issuing a "not initialized variable" warning - related to:
https://github.com/rails/rails/pull/5237

The logic applied by this method is already handled by the [] override,
so there is no need to reset the variable here.

Set "March 1, 2012" as the release date for 3.2.2, 3.1.4, 3.0.12

Binary mode window bug

Trying alternative implementations of the inflections
is hard because the suite is coupled with the current
one, setting ivars by hand etc. This commit relies on
initialize_dup, as long as you maintain that one you
can tweak the implementation.

core extensions

[ci skip]

https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/34580
In this revision behavior of respond_to? had changed: now to ask about
protected method one should pass second argument `true`

The impact of this change has been measured pluralizing
the entire /usr/share/dict/words, showing a 6x speedup

Closes #4883

Also remove an unasserted line in the tests.