[issue7677] upload: improve display for error messages from gpg

[Parimala Rao]

Parimala Rao added the comment:

This error is seen when there are no secret keys/default keys present for the person running "upload" command.  Hence using --sign does not fall back to default identity.

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nosy: +Parimala.Rao
Added file: http://bugs.python.org/file34521/patchfix

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7677>
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