Using undo on the tutorial.

[Lute Kamstra]

When a user reads the tutorial with C-h t and starts experimenting
with undo, one undo too many will remove the entire text of the
tutorial.  What about the following patch to fix this?

Lute.


*** lisp/help-fns.el    7 Jan 2005 16:12:34 -0000       1.63
--- lisp/help-fns.el    2 Feb 2005 11:57:06 -0000
***************
*** 97,102 ****
--- 97,103 ----
          (forward-line 1)
          (newline (- n (/ n 2)))))
        (goto-char (point-min))
+       (setq buffer-undo-list nil)
        (set-buffer-modified-p nil))))
  
  ;;;###autoload