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diff --git a/lisp/auto-show.el b/lisp/auto-show.el
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-;;; auto-show.el --- perform automatic horizontal scrolling as point moves
-;;; This file is in the public domain.
-
-;;; Keywords: scroll display minor-mode
-;;; Author: Pete Ware <ware@cis.ohio-state.edu>
-;;; Maintainer: FSF
-
-;;; Commentary:
-
-;;; This file provides functions that
-;;; automatically scroll the window horizontally when the point moves
-;;; off the left or right side of the window.
-
-;;; Once this library is loaded, automatic horizontal scrolling
-;;; occurs whenever long lines are being truncated.
-;;; To request truncation of long lines, set the variable
-;;; Setting the variable `truncate-lines' to non-nil.
-;;; You can do this for all buffers as follows:
-;;;
-;;; (set-default 'truncate-lines t)
-
-;;; Here is how to do it for C mode only:
-;;;
-;;; (set-default 'truncate-lines nil)	; this is the original value
-;;; (defun my-c-mode-hook ()
-;;;   "Run when C-mode starts up.  Changes ..."
-;;;   ... set various personal preferences ...
-;;;   (setq truncate-lines t))
-;;; (add-hook 'c-mode-hook 'my-c-mode-hook)
-;;;
-;;;
-;;; As a finer level of control, you can still have truncated lines but
-;;; without the automatic horizontal scrolling by setting the buffer
-;;; local variable `auto-show-mode' to nil.  The default value is t.
-;;; The command `auto-show-mode' toggles the value of the variable
-;;; `auto-show-mode'.
-
-;;; Code:
-
-(defvar auto-show-mode t
-  "*Non-nil enables automatic horizontal scrolling, when lines are truncated.
-The default value is t.  To change the default, do this:
-	(set-default 'auto-show-mode nil)
-See also command `auto-show-mode'.
-This variable has no effect when lines are not being truncated.")
-
-(make-variable-buffer-local 'auto-show-mode)
-
-(defvar auto-show-shift-amount 8 
-  "*Extra columns to scroll. for automatic horizontal scrolling.")
-
-(defvar auto-show-show-left-margin-threshold 50
-  "*Threshold column for automatic horizontal scrolling to the right.
-If point is before this column, we try to scroll to make the left margin
-visible.  Setting this to 0 disables this feature.")
-
-(defun auto-show-truncationp ()
-  "True if line truncation is enabled for the selected window."
-  (or truncate-lines 
-      (and truncate-partial-width-windows
-	   (< (window-width) (frame-width)))))
-
-;;;###autoload
-(defun auto-show-mode (arg)
-  "Turn automatic horizontal scroll mode on or off.
-With arg, turn auto scrolling on if arg is positive, off otherwise."
-  (interactive "P")
-  (setq auto-show-mode
-	(if (null arg)
-	    (not auto-show-mode)
-	  (> (prefix-numeric-value arg) 0))))
-  
-(defun auto-show-make-point-visible (&optional ignore-arg)
-  "Scroll horizontally to make point visible, if that is enabled.
-This function only does something if `auto-show-mode' is non-nil
-and longlines are being truncated in the selected window.
-See also the command `auto-show-toggle'."
-  (interactive)
-  (if (and auto-show-mode (auto-show-truncationp)
-	   (equal (window-buffer) (current-buffer)))
-      (let* ((col (current-column))	;column on line point is at
-	     (scroll (window-hscroll))	;how far window is scrolled
-	     (w-width (- (window-width) 
-			 (if (> scroll 0)
-			     2 1)))	;how wide window is on the screen
-	     (right-col (+ scroll w-width)))
-	(if (and (< col auto-show-show-left-margin-threshold)
-		 (< col (window-width))
-		 (> scroll 0))
-	    (scroll-right scroll)
-	  (if (< col scroll)		;to the left of the screen
-	      (scroll-right (+ (- scroll col) auto-show-shift-amount))
-	    (if (or (> col right-col)	;to the right of the screen
-		    (and (= col right-col)
-			 (not (eolp))))
-		(scroll-left (+ auto-show-shift-amount 
-				(- col (+ scroll w-width))))
-	      )
-	    )
-	  )
-	)
-    )
-  )
-
-;; Do auto-scrolling after commands.
-(add-hook 'post-command-hook 'auto-show-make-point-visible)
-
-;; Do auto-scrolling in comint buffers after process output also.
-(add-hook 'comint-output-filter-functions 'auto-show-make-point-visible t)
-
-(provide 'auto-show)
-
-;; auto-show.el ends here
-