[issue38661] Changes to tkinter result in (unexpected) widget map call return changes wrt. 3.7

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38661>
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