GPLv3/L8R - How should the copyright notice look?

So using that notice and changed for XEmacs it could look like this. Would it be OK to use this or do we need to spell it out some other way? ---------------------------------------------------------------------- This file is part of XEmacs. XEmacs 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. XEmacs 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 XEmacs. If not, see <http://www.gnu.org/licenses/>;. ----------------------------------------------------------------------

Related to this change is that the date of the copyright is normally not updated on this type of copyright change. Is this correct?