[issue25548] Show the address in the repr for class objects

[Brett Cannon]

Brett Cannon added the comment:

Patch LGTM. Just needs doc and What's New updates.

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assignee:  -> kushal.das
nosy: +brett.cannon
stage: patch review -> commit review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25548>
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