fix trailing whitespace everywhere

OpenRA.Game/Selection.cs

@@ -1,7 +1,7 @@
 #region Copyright & License Information
 /*
  * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
- * This file is part of OpenRA, which is free software. It is made 
+ * This file is part of OpenRA, which is free software. It is made
  * available to you under the terms of the GNU General Public License
  * as published by the Free Software Foundation. For more information,
  * see COPYING.
@@ -24,7 +24,7 @@ namespace OpenRA
 			foreach (var ns in w.WorldActor.TraitsImplementing<INotifySelection>())
 				ns.SelectionChanged();
 		}
-		
+
 		public bool Contains(Actor a)
 		{
 			return actors.AsEnumerable().Contains(a);