Fix trailing whitespace

configure.ac

@@ -1,35 +1,35 @@
-# 
+#
 #   Empire - A multi-player, client/server Internet based war game.
 #   Copyright (C) 1986-2008, Dave Pare, Jeff Bailey, Thomas Ruschak,
 #                            Ken Stevens, Steve McClure
-# 
+#
 #   This program 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.
-# 
+#
 #   This program 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 this program; if not, write to the Free Software
 #   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-# 
+#
 #   ---
-# 
+#
 #   See files README, COPYING and CREDITS in the root of the source
 #   tree for related information and legal notices.  It is expected
 #   that future projects/authors will amend these files as needed.
-# 
+#
 #   ---
-# 
+#
 #   configure.ac: Autoconf input file
-#  
+#
 #   Known contributors to this file:
 #      Markus Armbruster, 2005-2008
-# 
+#
 # Process this file with autoconf to produce a configure script.
 
 # Autoconf makes checking for and programming around assorted ancient