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

[Terry J. Reedy]

Terry J. Reedy added the comment:


New changeset df0f99329843c10701ffaefbd3948ac698c12220 by terryjreedy in branch '3.6':
[3.6] bpo-30780: Fix error in idlelib.test_idle.test_configdialog (GH-2606) (#2613)
https://github.com/python/cpython/commit/df0f99329843c10701ffaefbd3948ac698c12220


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