Standardize license wording, and switch license to GPLv3 or later.

lisp/gnus/gnus-diary.el

@@ -12,8 +12,8 @@
 
 ;; GNU Emacs is free software; you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published
-;; by the Free Software Foundation; either version 2 of the License,
-;; or (at your option) any later version.
+;; by the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
 
 ;; GNU Emacs is distributed in the hope that it will be useful, but
 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -21,9 +21,9 @@
 ;; General Public License for more details.
 
 ;; You should have received a copy of the GNU General Public License
-;; along with this program; if not, write to the Free Software
-;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
-;; MA 02110-1301, USA.
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
 
 
 ;;; Commentary: