bug#11660: 24.1; Supercite doesn't work with RMAIL in 24.1

[Glenn Morris <rgm@gnu.org>]

Kenichi Handa wrote:

> With the release candidata of 24.1, supercite doesn't work
> with RMAIL.

This simple patch fixes it. Tested with and without supercite, and with
sendmail- and message- user-agents.

To test, apply the 4 possible forms for eval:

emacs -Q --eval "(progn (add-hook 'mail-citation-hook 'sc-cite-original)
                        (setq mail-user-agent 'sendmail-user-agent))"

C-u M-x rmail RET /path/to/mbox RET
r
C-c C-y

(The message and mail citation commands leave point in different
positions, but they did in 23.4 too.)

Should this be installed in emacs-24?

*** lisp/mail/rmail.el	2012-05-04 11:17:28 +0000
--- lisp/mail/rmail.el	2012-06-09 18:19:56 +0000
***************
*** 3567,3573 ****
    (with-current-buffer buffer
      (unless (rmail-buffers-swapped-p)
        (setq buffer rmail-view-buffer)))
!   (insert-buffer buffer)
    ;; If they yank the text of BUFFER, the encoding of BUFFER is a
    ;; better default for the reply message than the default value of
    ;; buffer-file-coding-system.
--- 3567,3573 ----
    (with-current-buffer buffer
      (unless (rmail-buffers-swapped-p)
        (setq buffer rmail-view-buffer)))
!   (insert-buffer-substring buffer)
    ;; If they yank the text of BUFFER, the encoding of BUFFER is a
    ;; better default for the reply message than the default value of
    ;; buffer-file-coding-system.