[issue23252] Add support of writing to unseekable file in zipfile

[Roundup Robot]

Roundup Robot added the comment:

New changeset 19f36a2a34ec by Serhiy Storchaka in branch 'default':
Issue #23252:  Added support for writing ZIP files to unseekable streams.
https://hg.python.org/cpython/rev/19f36a2a34ec

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23252>
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