[issue32374] Document that m_traverse for multi-phase initialized modules can be called with m_state=NULL

[Marcel Plch]

Change by Marcel Plch <gmarcel.plch at gmail.com>:


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keywords: +patch
pull_requests: +4821
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32374>
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