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It's really hard to understand true, and if should not go in the patch in general of course.
The sense was that the only test I added is trivial, but I haven't produced something better yet.
And ok I will remove the docstrings, I was actually doing it on purpose thinking about the unittest feature, but if the name is clear enough than is better to leave the docstring out...
Another thing, I didn't want to use tempfile.mktemp to generate a temporary file, but dump_stats doesn't accept anything else, is it in general safe to use it in this case?