paul j3 <ajipa...@gmail.com> added the comment:

Post parsing testing for the correct number of strings is the easy part.

It's the auto-generate usage that's harder to do right, especially if we wanted 
to enable the metavar tuple option.  Clean usage for '+' is messy enough.

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue11354>
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