[mlyle]

This has some advantages-- it's numerically precise and can be more flexible, but it has some downsides over the suggested approach.

- The quantization of the graphs is a feature to add some tolerance to the tests. I admit this is a mixed blessing.

- This is a lot more opaque to someone looking at a text file of the test output than what is described in the post.

[PaulDavisThe1st]

The opacity of the .dat file is real and deep. But I'd expect the opacity of the go/python/lua/whatever code that generates the .dat to be extremely low, and that's what you'd read.