[issue29672] `catch_warnings` context manager causes all warnings to be printed every time, even after exiting

[Segev Finer]

Change by Segev Finer <segev208 at gmail.com>:


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keywords: +patch
pull_requests: +7769
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue29672>
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