public void UnmergeInPlaceWorks()
{
var l1 = new PtrLenList();
l1.TryInclude(0, 2);
l1.TryInclude(5, 5);
l1.TryInclude(15, 10);
var l2 = new PtrLenList();
l2.TryInclude(6, 3);
l2.TryInclude(15, 10);
l1.UnmergeInPlace(l2);
Assert.AreEqual("0-2;5-6;9-10", Str(l1));
}