diff options
Diffstat (limited to 'lisp/ruler-mode.el')
| -rw-r--r-- | lisp/ruler-mode.el | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lisp/ruler-mode.el b/lisp/ruler-mode.el index b2c48349a05..13895aea2eb 100644 --- a/lisp/ruler-mode.el +++ b/lisp/ruler-mode.el @@ -29,7 +29,7 @@ ;;; Commentary: ;; This library provides a minor mode to display a ruler in the header -;; line. It works only on Emacs 21. +;; line. It works from Emacs 21 onwards. ;; ;; You can use the mouse to change the `fill-column' `comment-column', ;; `goal-column', `window-margins' and `tab-stop-list' settings: @@ -562,7 +562,8 @@ Call `ruler-mode-ruler-function' to compute the ruler value.") (progn ;; When `ruler-mode' is on save previous header line format ;; and install the ruler header line format. - (when (local-variable-p 'header-line-format) + (when (and (local-variable-p 'header-line-format) + (not (local-variable-p 'ruler-mode-header-line-format-old))) (set (make-local-variable 'ruler-mode-header-line-format-old) header-line-format)) (setq header-line-format ruler-mode-header-line-format) |