I've found it hard to write tests (though there are a few here - https://github.com/sahilm/fuzzy/blob/master/fuzzy_test.go ). Match quality is often subjective. Tweaking one parameter messes with others.

This library came out of a project I started. The project never saw the light of day. If I do see real world use, it'll be easier to find bugs and fix them :)

That sounds to me like a great starting point for others to contribute code. :P

Can't we all just be happy that someone decided to write a fun project and made it freely available for others to learn from?

I suspect "hopefully" is in reference to the fact that it's doing fuzzy matching.