-(defun backward-other-window (arg &optional all-frames device)
- "Select the ARG'th different window on this frame, going backwards.
-This is just like calling `other-window' with the arg negated."
+(defun backward-other-window (count &optional which-frames which-devices)
+ "Select the COUNT'th different window on this frame, going backwards.
+This is just like calling `other-window' with COUNT negated."