Fix eww-open-file for MS-Windows and MS-DOS.

 lisp/net/eww.el (eww-open-file): Ensure 3 slashes after "file:" when
 we run on MS-Windows or MS-DOS.

lisp/ChangeLog

+2013-12-24  Eli Zaretskii  <eliz@gnu.org>
+
+	* net/eww.el (eww-open-file): Ensure 3 slashes after "file:" when
+	we run on MS-Windows or MS-DOS.
+
 2013-12-24  Martin Rudalics  <rudalics@gmx.at>
 
 	* window.el (balance-windows-area): Call window-size instead of

lisp/net/eww.el

@@ -167,7 +167,10 @@ word(s) will be searched for via `eww-search-prefix'."
 (defun eww-open-file (file)
   "Render a file using EWW."
   (interactive "fFile: ")
-  (eww (concat "file://" (expand-file-name file))))
+  (eww (concat "file://"
+	       (and (memq system-type '(windows-nt ms-dos))
+		    "/")
+	       (expand-file-name file))))
 
 (defun eww-render (status url &optional point)
   (let ((redirect (plist-get status :redirect)))