Patch by Tatiana Al-Chueyr.

Tkinter.Variables; harmonize exceptions to ValueError; only delete variables
that have not been deleted; assert that variable names are strings
Patch by Andrew Svetlov.

Contrary to the documentation, finditer() did not take pos and endpos
keyword arguments.

patch written by Nicholas Riley.

str.format_map tests don't do what they say: fix to actually implement the intent of the test. Closes #13450. Patch by Akira Li.

str.format_map tests don't do what they say: fix to actually implement the intent of the test. Closes #13450.

#13394: add more tests for the aifc module and use warnings.warn instead of print.  Patch by Oleg Plakhotnyuk.

Thanks for James Sanders for the bug report and the patch.

Issue #14252: Fix subprocess.Popen.terminate() to not raise an error under Windows when the child process has already exited.

Issue #14252: Fix subprocess.Popen.terminate() to not raise an error under Windows when the child process has already exited.