Aust01

ClearWindow.py adding to standard IDLE - 2 lines of code needs fix

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The ClearWindow.py extension needs fix: 1. On line 64, `from idlelib.UndoDelegator import DeleteCommand` the UndoDelegator does not exist. It is located in idlelib.undo FIX: `from idlelib.undo import DeleteCommand` 2. On...