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Implementation of a flexible versioning scheme providing support for PEP-440,
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TODO: fill this out
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doesn't like it) then you might be able to get an equivalent (or close)
rational version from this function.
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on observation of versions currently in use on PyPI. Given a dump of
those version during PyCon 2009, 4287 of them:
- 2312 (53.93%) match NormalizedVersion without change
with the automatic suggestion
- 3474 (81.04%) match when using this suggestion method
@param s {str} An irrational version string.
@returns A rational version string, or None, if couldn't determine one.
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