Diff eqv result

[1Jajen1]

Currently the counterexample added by eqv just prints both values one after the other. A proper diff can make it a lot clearer what is happening.

I have a working version that uses kotlin-pretty for nice output, a parser for generic toString output (works best with data classes) and a decent diffing algorithm. The result is quite nice and I plan on releasing it together with the internals rewrite soon.

This can be taken a lot further with showing errors and values at correct positions in code etc.