[issue14652] Better error messages for wsgiref validator failures

[Sidney San Martín]

Sidney San Martín <s at sidneysm.com> added the comment:

Thanks Jeff, I’m actually a relatively new Python developer and got the impression that it was best practice to always use a tuple for string formatting, for consistency.

Here’s an updated patch which drops the tuples for those cases.

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Added file: http://bugs.python.org/file25624/ssm_validate.patch

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