Variable: message-indent-citation-function
message-indent-citation-function is a customizable variable defined in
message.el.gz.
Value
message-indent-citation
Documentation
Function for modifying a citation just inserted in the mail buffer.
This can also be a list of functions. Each function can find the citation between (point) and (mark t). And each function should leave point and mark around the citation text as modified.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
(defcustom message-indent-citation-function #'message-indent-citation
"Function for modifying a citation just inserted in the mail buffer.
This can also be a list of functions. Each function can find the
citation between (point) and (mark t). And each function should leave
point and mark around the citation text as modified."
:type '(choice function
(repeat function))
:link '(custom-manual "(message)Insertion Variables")
:group 'message-insertion)