[issue30468] Propagate zipfile.py pypy issue #905 patch to CPython 3.7

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I'm not the initial author of zipfile. That initial code for decrypting  was added in issue698833.

I like your idea about replacing the generating code with the precomputed table. Please open a separate issue for this.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30468>
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