'release22-maint'.

Describe super() very briefly
A few minor reformattings and wording changes
Set the release date (presumably tomorrow...)

Remove reference to this being a draft

Bump version number

Reflow paragraph

Mention change to _PyTuple_Resize

Bump version number

Bump version number

Bump version number

Use attribute assignment to illustrate __slots__ raising an error

        - Describe UnpackTuple()
        - Credit __unicode__ to MAL
Use \pep macro everywhere in body text.
   (Listening to "The Great Gate of Kiev" -- appropriately triumphal
    music for this check-in...)

    to be covered in an overview article like this.

\filename{} should be \file{}

Bump version number.

Fix two errors

Update the patch and bug counts

Add removal of 3-arg pow() for floats
Rewrite introduction a bit

Rewrite snprintf() item a bit
Bump version number

Minor grammatical changes, reformattings, and an error fix from Keith Briggs

Correct error noticed by Keith Briggs
Re-indent a paragraph

Add string.ascii_letters
Remove duplicate MBCS paragraph

Note new Windows installer