You are correct that it’s strictly unnecessary as long as there’s some way to detect when the third address was omitted, e.g. by requiring a newline. I left th

You are correct that it’s strictly unnecessary as long as there’s some way to detect when the third address was omitted, e.g. by requiring a newline. I left the requirement in to make it look more like typical assembly language and also as a reminder of what it’s doing (and making the distinction between “.data” a little more obvious). I also thought the tedium of typing “subleq” fit nicely into the theme of the game. So I guess it was more of an aesthetic decision.