Remove trailing whitespace.

Also fixes a minor typo.
diff --git a/COPYING b/COPYING
index 240ee09..7f4efc9 100644
--- a/COPYING
+++ b/COPYING
@@ -1,6 +1,6 @@
 Copyright 2001-2011 Xiph.Org, Skype Limited, Octasic,
                     Jean-Marc Valin, Timothy B. Terriberry,
-                    CSIRO, Gregory Maxwell, Mark Borgerding, 
+                    CSIRO, Gregory Maxwell, Mark Borgerding,
                     Erik de Castro Lopo
 
 Redistribution and use in source and binary forms, with or without