[issue27922] Make IDLE tests less flashy

[Roundup Robot]

Roundup Robot added the comment:

New changeset 6e4475894a79 by Terry Jan Reedy in branch '2.7':
Issue #27922: IDLE test_idlehistory no longer flash tk widgets.
https://hg.python.org/cpython/rev/6e4475894a79

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27922>
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