[issue30780] IDLE: configdialog - add tests for ConfigDialog GUI.

[Terry J. Reedy]

Terry J. Reedy added the comment:


New changeset 25a4206c243e3b1fa6f5b1c72a11b409b007694d by terryjreedy in branch 'master':
bpo-30780: Fix error in idlelib.test_idle.test_configdialog (#2606)
https://github.com/python/cpython/commit/25a4206c243e3b1fa6f5b1c72a11b409b007694d


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