[issue28292] Make Calendar.itermonthdates() behave consistently in edge cases

[Raymond Hettinger]

Change by Raymond Hettinger <raymond.hettinger at gmail.com>:


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pull_requests: +14855
stage: resolved -> patch review
pull_request: https://github.com/python/cpython/pull/15113

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue28292>
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