[issue27609] IDLE completions: format, factor, and fix

[Roundup Robot]

Roundup Robot added the comment:

New changeset 1ec47de72538 by Terry Jan Reedy in branch 'default':
Issue #27609: Explicitly return None when there are other returns.
https://hg.python.org/cpython/rev/1ec47de72538

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27609>
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