Issue #21311: Avoid exception in _osx_support with non-standard compiler
configurations.  Patch by John Szakmeister.
Issue 21284: Idle: make test_formatparagraph pass even when a user changes the
reformat width in the configuration menu.
Issue #21138: Change default reformat paragraph width to PEP 8's 72.
Issue #21303, #20565: Updated the version of Tcl/Tk used on Windows
from 8.5.2 to 8.5.15.
fix off-by-one error (closes #21330)
Issue #21346: Fix typos in test_itertools.  Patch by Brian Kearns.
Issue #20434 Correct error handlin of _PyString_Resize and _PyBytes_Resize
Issue21349 Passing a memoryview to _winreg.SetValueEx now correctly raises a TypeError where it previously crashed the interpreter. Patch by Brian Kearns
Add NEWS entry for issue21349
Issue #18944: backport typo fix
Issue #17145:  Document array.array buffer interface limitations.
#18243: Remove obsolete cautionary note from email mktime_tz docs.