[issue21747] argvars: error while parsing under windows

[paul j3]

paul j3 added the comment:

It's essentially the same issue as http://bugs.python.org/issue21666.

An error in the 'help' parameter is not caught until 'print_help' is called (via 'parse_args').  

A possible improvement is to test the 'help' string during 'add_argument'.  Similar testing for 'nargs' and 'metavar' has been proposed.

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nosy: +paul.j3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21747>
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