[issue1717] Get rid of more references to __cmp__

[Nils Kattenbeck]

Nils Kattenbeck <nilskemail at gmail.com> added the comment:

Has there been any resolution regarding `sortTestMethodsUsing`? See https://bugs.python.org/msg77261

I spend a decent time and read the documentation thrice before realizing it received an old-style compare function. Brett's proposal for a new attribute seems like a sane way to do this without breaking backwards compatibility. Or will this continue using an old-style compare function for the foreseeable future?

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nosy: +Nils Kattenbeck

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