Aha, I used the blame function (View File > Blame) and saw that actually @rmandelb is the author!

Rachel, I'm guessing this file is used for testing the convergence of HSM.  But it's quite a good sized module, so I think a top-level description as to what tests the module runs, and in which context these tests were needed and the results used, would be very good.

Alternatively, if it is in another branch and is better kept there separately, we should delete it from this branch.  Indeed, Tomek, if you don't use this at all then maybe this is the best option....