Make check weirdness

[Carl Sorensen]

I'm trying to do regression test checking, but it doesn't seem to be working
right.

I did

make test-baseline

Then I switched to my new branch and did

make && make check

I found some differences, so I patched the code, then did

make test-redo
make check

After this, I got a comparison output that only listed tree.gittxt,
with 762 below threshold, and 1459 unchanged.

This doesn't seem right, because output-distance.ly should have changed.

Any ideas as to what I'm doing wrong?

Thanks,

Carl