Simon Marlow
While we're on emacs... I know I can colour trailing whitespace differently, but that's just annoying.
You could use something more discreet, like colored underlines.
What I want is: on lines that I edit, remove the trailing whitespace (and if I undo the edit, put the whitespace back too). Is there something that does that?
;; Difficulties are that a) in general changes doesn't necessarily ;; happen at the location of point, and OTOH b) commands can ;; temporarily move point behind the scenes, but c) we don't want ;; characters do disappear under our feet (point) . Try to do ;; something sensible. (defun line-delete-trailing-whitespace (beg end len) (unless (or (eolp) undo-in-progress) (save-excursion (end-of-line) (delete-char (- (skip-chars-backward " \t" end)))))) ;; Buffer local, use a mode hook (add-hook 'after-change-functions 'line-delete-trailing-whitespace nil t) ;; To see what's going on (setq show-trailing-whitespace t) -- Johan Bockgård