Ruby copyright header as multi-line comment, for use with the GPLv3.

copyright_header.rb

=begin
  Copyright © 2019 Todd A. Jacobs

  This file is part of FIXME.

  FIXME 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 3 of the License, or (at your option) any later
  version.

  FIXME is distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  A PARTICULAR PURPOSE. See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with
  FIXME. If not, see <https://www.gnu.org/licenses/>.
=end