alias doesn't work without arguments

[stiletto]

Example:

<Stiletto> alias -s unsub usub %1 <bnw.im> OK. Alias unsub updated. <Stiletto> unsub <bnw.im> No such command: unsub <Stiletto> unsub 1 <bnw.im> ERROR. Usage: unsubscribe <-u username|-t tag|-c club|-m message> <Stiletto> unsub -m 123456 <bnw.im> OK. Unsubscribed.