revert file

[hall@allegra.att.com (Bob Hall)]

1. Create a new file buffer in Fred
2. Type in the following form
  (with-open-file (str "hard disk:lisp code:server:glop"
                       :direction :output
                       :if-exists :supersede)
    (format str "~%Blatzorg"))
3. Save it as the file "hard disk:lisp code:server:glop" (or whatever)
4. Evaluate the form

Question: Why is the Revert menu item in the File menu is disabled?
In fact, fred just lets me edit the buffer and save it, completely
oblivious to the fact that the file has changed.

-- Bob