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.

It now reports if configure and pyconfig.h.in weren't regenerated but
configure.in was changed.

(PPC buildbot)

Close #14210: add command argument completion to pdb: complete file names, global/local variables, aliases