This is because of how the REPL decides whether to output the result of a function or not.
When something outputs stuff on stdout (like say does), it'll notice that and suppress the return value printing. note, however, outputs on stderr, which the REPL doesn't inspect for output. I think this behaviour is all right, because you may get warnings or things like that but still want the return value of your code, whereas if you do some output in your code, you'll probably be getting what you want from the output and not need the return value of the whole statement on top of that. I'd close this as "not a bug".
