Variable: normal-auto-fill-function
normal-auto-fill-function is a variable defined in simple.el.gz.
Value
do-auto-fill
Documentation
The function to use for auto-fill-function(var)/auto-fill-function(fun) if Auto Fill mode is turned on.
Some major modes set this.
Probably introduced at or before Emacs version 19.33.
Source Code
;; Defined in /usr/src/emacs/lisp/simple.el.gz
(defvar normal-auto-fill-function 'do-auto-fill
"The function to use for `auto-fill-function' if Auto Fill mode is turned on.
Some major modes set this.")