[issue25452] Add __bool__() method to subprocess.CompletedProcess

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

See also issue26748. Classes usually have True boolean value, but empty enum classes were False-y by accident. This was considered a bug.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25452>
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