[issue10366] Remove unneeded '(object)' from 3.x class examples

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

These mostly look good.  Do leave the howto documents as-is.  They have some value across multiple versions of Python.  Also, the descriptor how-to in particular gets some benefit from keeping (object) explicit because it helps remind users which version of __getattribute__ is being run.

Other than the how-tos, please go ahead and apply.

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nosy: +rhettinger

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