[PATCH] emacs: escape % in header line format

[David Bremner]

We set header-line-format to the message subject, but if the subject
contains percents, the next character is interpreted as a formatting
control, which is not desired.
---

You're correct of course. I have no idea how my testing convinced me
the previous version worked.

emacs/notmuch-show.el | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index 9f6fe07..87b4881 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -1198,7 +1198,11 @@ function is used."
       (notmuch-show-mapc (lambda () (notmuch-show-set-prop :orig-tags (notmuch-show-get-tags))))
 
       ;; Set the header line to the subject of the first message.
-      (setq header-line-format (notmuch-sanitize (notmuch-show-strip-re (notmuch-show-get-subject))))
+      (setq header-line-format
+	    (replace-regexp-in-string "%" "%%"
+			    (notmuch-sanitize
+			     (notmuch-show-strip-re
+			      (notmuch-show-get-subject)))))
 
       (run-hooks 'notmuch-show-hook))))
 
-- 
2.1.4