[issue22823] Use set literals instead of creating a set from a list

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

That's all I think. Distutils is too conservative for such changes.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22823>
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