[issue39136] Typos in whatsnew file and docs

[Terry J. Reedy]

Change by Terry J. Reedy <tjreedy at udel.edu>:


----------
pull_requests: +17176
pull_request: https://github.com/python/cpython/pull/17731

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39136>
_______________________________________