[issue18996] unittest: more helpful truncating long strings

[Michael Foord]

Michael Foord added the comment:

Awesome, thanks for this work. 

The only thing I'd say is that if  _common_shorten is always called with two args - and safe_repr is always called on them - then why not have it take two args and call safe_repr on them?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18996>
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