[issue9766] warnings has "onceregistry" and "once_registry"

[Brett Cannon]

Brett Cannon <brett at python.org> added the comment:

OK, so I will fix this in 3.2 but not any other versions as someone might be foolishly relying on the name. Hopefully I can get to this over the weekend.

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keywords: +easy
versions:  -Python 2.7, Python 3.1

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