* lisp/emacs-lisp/package.el (package-activate-1): Avoid duplicates

in `Info-directory-list`.

diff --git a/lisp/emacs-lisp/package.el b/lisp/emacs-lisp/package.el
index bce17a04ba78fb3cee3c3787af9e69eee329149b..07d63b3a7dc77a50e5adeaf30184ac2a5436e976 100644 (file)
--- a/lisp/emacs-lisp/package.el
+++ b/lisp/emacs-lisp/package.el
@@ -798,7 +798,7 @@ correspond to previously loaded files (those returned by
         ;; FIXME: not the friendliest, but simple.
         (require 'info)
         (info-initialize)
-        (push pkg-dir Info-directory-list))
+        (add-to-list 'Info-directory-list pkg-dir))
       (push name package-activated-list)
       ;; Don't return nil.
       t)))