[issue45498] [doc] Fix a code example, non declared variable being printed

[Lahfa Samy]

Change by Lahfa Samy <lahfa121999 at gmail.com>:


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pull_requests: +27281
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/28999

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45498>
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