mozilla / fathom / 618 / 1

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travis-ci

Don't spit out nans for precision or F1 when we don't get any right.

I don't see value in distinguishing between divide-by-zero and 0 for these. The point is, we didn't get any right, and 0 conveys that. Furthermore, the reasons can now be diagnosed using the confusion matrix.

Keeping nans out of FPR and FNR are a project for another day.

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