#22751: fix test___all__ warning about modified environment in the tests.  Patch by Michael Cetrulo.
Issue #22388: Unified the style of "Contributed by" sentences in What's New.
Merge heads
Fix English phrasing.
Reflow paragraph.
Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff bytes on a 32-bit platform.