[docs] [issue35722] disable_existing_loggers does not apply to the root logger

[miss-islington]

Change by miss-islington <mariatta.wijaya+miss-islington at gmail.com>:


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keywords: +patch, patch
pull_requests: +11445, 11446

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35722>
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