I noticed that too and I think it's a bit weird line that Aragorn has (ehh...no pun intended

).
Lol! I can imagine that. Aragorn is peeved about the doubt of the King of the Dead and with a frustrated tone and a pout he replies: "No it wasn't!"
But seriously, I wonder if there's going to be something between those lines in the EE. I can't imagine, what it could be, though.