[issue44980] Clean up tests that return a value that isn't None

[Łukasz Langa]

Change by Łukasz Langa <lukasz at langa.pl>:


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title: Clean up a few tests that return a value!=None -> Clean up tests that return a value that isn't None

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44980>
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