[ESS] comint-delete-output including prompt

[Sebastian Luque]

Hello,

I find that I usually want to delete the previous output and the previous
prompt when I do C-c C-o (comint-delete-output) in the iESS buffer. I
haven't been able to find how to do this in ESS. Can somebody please point
me to the right function or suggest some alternative? I'm using Emacs
21.4.1, ESS 5.2.7 and R 2.1.0.

Thanks in advance,
-- 
Sebastian P. Luque