[docs] [issue8722] Documentation for __getattr__

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Nick, this is about better documenting the behavior of __get(set/del)attr__ in 3.x it relations to AttributeError in a property.  I think I understand what it does and think the patch is correct.  Could you either review or suggest someone else who better understands core behavior like this?

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components: +Interpreter Core
nosy: +ncoghlan
versions: +Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue8722>
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