[docs] [issue9182] document “--” as a way to distinguish option w/ narg='+' from positional argument in argparse

[Steven Bethard]

Steven Bethard <steven.bethard at gmail.com> added the comment:

Ok, here's what I think needs to go into the documentation here:

(1) Add a separate section to the argparse docs about '--'. Give examples like the ones in this issue, and show how '--' can solve them

(2) Cross-reference the section on '--' from nargs='?', nargs='*', nargs='+' and the "Arguments containing -" sections (and any other places where people are likely to run into the need for '--').

All of these changes should be on Doc/library/argparse.rst - I don't think we want to change the code at the moment.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9182>
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