[issue32765] IDLE: Update configdialog docstrings to reflect extension integration

[Cheryl Sabella]

Change by Cheryl Sabella <chekat2 at gmail.com>:


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keywords: +patch
pull_requests: +5356
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32765>
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