edt-substitute
edt-substitute is an interactive compiled Lisp function in `edt.el
'.
(edt-substitute NUM)
Replace the selected region with the contents of the CUT buffer and.
Repeat the most recent FIND command. (The Emacs kill ring is used as
the CUT buffer.)
Argument NUM is the repeat count. A positive value indicates the of times
to repeat the substitution. A negative argument means replace all occurrences
of the search text.