Variable: message-mark-insert-begin
message-mark-insert-begin is a customizable variable defined in
message.el.gz.
Value
"--8<---------------cut here---------------start------------->8---\n"
Documentation
How to mark the beginning of some inserted text.
This variable was added, or its default value changed, in Emacs 22.1.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
;;; marking inserted text
(defcustom message-mark-insert-begin
"--8<---------------cut here---------------start------------->8---\n"
"How to mark the beginning of some inserted text."
:version "22.1"
:type 'string
:link '(custom-manual "(message)Insertion Variables")
:group 'message-various)