[issue24360] improve argparse.Namespace __repr__ for invalid identifiers.

[R. David Murray]

R. David Murray added the comment:

If one is going to have a repr at all, I think it should be as accurate as practical.  I think this is worthwhile, and favor the existing patch.

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nosy: +r.david.murray

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24360>
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