[issue37627] Minor improvements to IDLE's "Run Customized"

[Ngalim Siregar]

Change by Ngalim Siregar <ngalim.siregar at gmail.com>:


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keywords: +patch
pull_requests: +14659
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/14870

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37627>
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