[issue21520] Erroneous zipfile test failure if the string 'bad' appears in pwd

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

The line is too long. It would be better to extract a filter as regular function. Otherwise LGTM.

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nosy: +serhiy.storchaka
stage: needs patch -> commit review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21520>
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