Variable: octave-block-comment-start
octave-block-comment-start is a variable defined in octave.el.gz.
Value
"## "
Documentation
String to insert to start a new Octave comment on an empty line.
Source Code
;; Defined in /usr/src/emacs/lisp/progmodes/octave.el.gz
(defvar octave-block-comment-start
(concat (make-string 2 octave-comment-char) " ")
"String to insert to start a new Octave comment on an empty line.")