Variable: fill-prefix

fill-prefix is a customizable and buffer-local variable defined in simple.el.gz.

Documentation

String for filling to insert at front of new line, or nil for none.

View in manual

Probably introduced at or before Emacs version 1.7.

Source Code

;; Defined in /usr/src/emacs/lisp/simple.el.gz
(defcustom fill-prefix nil
  "String for filling to insert at front of new line, or nil for none."
  :type '(choice (const :tag "None" nil)
                 string)
  :safe #'string-or-null-p
  :local t
  :group 'fill)