(mail-mode): Make mail-header-separator into regexp.

diff --git a/lisp/mail/sendmail.el b/lisp/mail/sendmail.el
index 82230e095111e6b8c156b448f7b1f0ff31901ca9..d2cc11c6c401cd39a60b925b256ceb2c03656d14 100644 (file)
--- a/lisp/mail/sendmail.el
+++ b/lisp/mail/sendmail.el
@@ -296,10 +296,10 @@ C-c C-v  mail-sent-via (add a sent-via field for each To or CC)."
   (setq font-lock-defaults '(mail-font-lock-keywords t))
   (make-local-variable 'paragraph-separate)
   (make-local-variable 'paragraph-start)
-  (setq paragraph-start (concat mail-header-separator
+  (setq paragraph-start (concat (regexp-quote mail-header-separator)
                                "$\\|[ \t]*[-_][-_][-_]+$\\|"
                                paragraph-start))
-  (setq paragraph-separate (concat mail-header-separator
+  (setq paragraph-separate (concat (regexp-quote mail-header-separator)
                                   "$\\|[ \t]*[-_][-_][-_]+$\\|"
                                   paragraph-separate))
   (run-hooks 'text-mode-hook 'mail-mode-hook))