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

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

Please mark all the non-public helper functions as being private by using a leading underscore for their names.  The __all__ listing is correct but is insufficient.  Note, the module already used the leading underscore convention for the some of the non-public helper classes.

Already, we have a user confused by this:  https://twitter.com/andreportela85/status/1148956749652738049

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status: closed -> open

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