[issue21820] unittest: unhelpful truncating of long strings.

[Chris Withers]

Chris Withers added the comment:

If I worked up a patch that:

- made sure this truncation wasn't used for non-strings

- added a class-attribute control for the truncation

Would it be well received?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21820>
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