[issue12703] Improve error reporting for packaging.util.resolve_name

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

I’m confused about what the proposed change would actually do.  Could you explain what behavior you want to change and how?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12703>
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