[issue34480] _markupbase.py fails with UnboundLocalError on invalid keyword in marked section

[Marek Suscak]

Change by Marek Suscak <marek.suscak at gmail.com>:


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pull_requests: +30325
pull_request: https://github.com/python/cpython/pull/32256

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34480>
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