Variable: message-indentation-spaces
message-indentation-spaces is a customizable variable defined in
message.el.gz.
Value
3
Documentation
Number of spaces to insert at the beginning of each cited line.
Used by message-yank-original via message-yank-cite.
This variable was added, or its default value changed, in Emacs 23.2.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
(defcustom message-indentation-spaces mail-indentation-spaces
"Number of spaces to insert at the beginning of each cited line.
Used by `message-yank-original' via `message-yank-cite'."
:version "23.2"
:group 'message-insertion
:link '(custom-manual "(message)Insertion Variables")
:type 'integer)