[issue9856] Change object.__format__(s) where s is non-empty to a DeprecationWarning

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

Perhaps this could be expanded to "Deprecation warnings in 3.3" with release-blocker priority to list all 3.2 PendingDWs. Once changes are made, it could be retitled "Removals in 3.4", with a new "Deprecation warnings in 3.4" added.

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nosy: +terry.reedy

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<http://bugs.python.org/issue9856>
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