[docs] [issue16893] Create IDLE help.txt from Doc/library/idle.rst

[Terry J. Reedy]

Changes by Terry J. Reedy <tjreedy at udel.edu>:


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assignee: docs at python -> 
versions: +Python 2.7, Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16893>
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