[issue4395] Document auto __ne__ generation; provide a use case for non-trivial __ne__

[Arfrever Frehtes Taifersar Arahesis]

Changes by Arfrever Frehtes Taifersar Arahesis <Arfrever.FTA at GMail.Com>:


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nosy: +Arfrever

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<http://bugs.python.org/issue4395>
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