[issue33396] IDLE: Improve and document help doc viewer

[Terry J. Reedy]

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


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dependencies: +IDLE: document the help document viewer -Checking for abstractmethod implementation fails to consider MRO for builtins

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33396>
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