Variable: mail-indentation-spaces
mail-indentation-spaces is a customizable variable defined in
sendmail.el.gz.
Value
3
Documentation
Number of spaces to insert at the beginning of each cited line.
Used by mail-yank-original via mail-indent-citation.
Source Code
;; Defined in /usr/src/emacs/lisp/mail/sendmail.el.gz
;;;###autoload
(defcustom mail-indentation-spaces 3
"Number of spaces to insert at the beginning of each cited line.
Used by `mail-yank-original' via `mail-indent-citation'."
:type 'integer)