`HermitePolynomialApproximation.interpolateOrderZero.` was actually unchanged in this PR.  I honestly have no idea how to trigger that block, it's been like that forever.  I'm sure I sound like I'm making excuses, but I'm not;  I'm just out of my element in the actual math (hence why @mdunkel did that part and not me).  We might be able to pull a test case out of Components that will do it though, but I think I've looked for one before and couldn't find it there either.