Changed the comments to make it more clear what was happening here.

Hey - love the book by the way. I am attempting to go through it in detail, and got caught up for a few hours on this part because to my untrained eye, I just couldn't for the life of me figure out what was going on here. I read the explanation for why the cloning was happing in the book itself as well, but it just didn't click. When I walked through it step by step and saw the reason for the temporary queue though, it completely made sense. I tried changing the comments to something that made it make much more sense to me, and tried keeping them as short as possible.