Message 147966 - Python tracker

Hi!

I'd like to have this committed to be able to fix #13349. So here's a review.

- In Doc/c-api/unicode.rst, the two "versionchanged:: 3.3" directives can be merged

- In tests, I'd use 'abcde' rather than 'xxxxx' to make sure that correct characters are copied to the output (hope you understand what I mean)

- No test checks that width and precision work on characters rather than bytes

- The changes to unicodeobject.c don't apply on top of current default branch.