[docs] [issue15125] argparse: positional arguments containing - in name not handled well

[Keith Hughitt]

Keith Hughitt added the comment:

Although it would be nice if the behavior were normalized between positional and optional args, it seems like doc patch would be the most straight-forward at this point. The down-side is that I suspect many people will assume the behavior for optional args, have it fail, and then consults the docs to see what happened.

I would suggest making the note pretty obvious or early on in the docs for argparse.

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<http://bugs.python.org/issue15125>
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