What is ss supposed to mean? Also, I only know what "u" means because of your "uniques" comment. Those comments also don't really help me quickly understand th

What is ss supposed to mean? Also, I only know what "u" means because of your "uniques" comment. Those comments also don't really help me quickly understand the code. I'd do a small doc comment along the lines of "Removes repeated elements from the supplied list, returning the remaining items in original order"