[issue6316] format, str.format don't work well with datetime, date object

[Eric Smith]

Changes by Eric Smith <eric at trueblade.com>:


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assignee:  -> eric.smith
components: +Interpreter Core -Extension Modules, Library (Lib)
nosy: +eric.smith

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6316>
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