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

[Ananthakrishnan]

Ananthakrishnan <ananthakrishnan15.2001 at gmail.com> added the comment:

Is this issue still needed?
Can I add a pull request for this.

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nosy: +Ananthakrishnan

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