;;; Boxed comments for C mode.
-;;; Copyright (C) 1991-1994, 2008-2013 Free Software Foundation, Inc.
-;;; Francois Pinard <pinard@iro.umontreal.ca>, April 1991.
+;;; Copyright (C) 1991-1994, 2008-2014, 2016-2017, 2020-2021 Free
+;;; Software Foundation, Inc.
+;;; François Pinard <pinard@iro.umontreal.ca>, April 1991.
;;;
;;; This file is part of GNU M4.
;;;
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
-;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+;;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; I often refill paragraphs inside C comments, while stretching or
;;; shrinking the surrounding box as needed. This is a real pain to