[issue22053] turtledemo: clean up start and stop, fix warning

[Roundup Robot]

Roundup Robot added the comment:

New changeset 823f5507bd86 by Terry Jan Reedy in branch '2.7':
Issue #22053: Cleanup turtledemo start and stop and fix debug shutdown warning.
http://hg.python.org/cpython/rev/823f5507bd86

New changeset 57531d65cdd4 by Terry Jan Reedy in branch '3.4':
Issue #22053: Cleanup turtledemo start and stop and fix debug shutdown warning.
http://hg.python.org/cpython/rev/57531d65cdd4

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nosy: +python-dev

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