Was that a typo? I've never heard of deadline and that's a pretty un-google-able word. GNU Readline has Emacs & Vi mode.
Or maybe meant as a pun?
While replying to this thread, my browser keeps autocorrecting "readline" to "deadline". So a case where technology makes us write correctly spelled nonsense :).
Phone "helping" me! I meant Readline.
No, it has a fixed key binding.
So it'll be of no use to those of us who use the vi mode.