Remove trailing whitespace.
diff --git a/COPYING b/COPYING
index f4159e6..9c739c3 100644
--- a/COPYING
+++ b/COPYING
@@ -14,7 +14,7 @@
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
-- Neither the name of Internet Society, IETF or IETF Trust, nor the
+- Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior written
permission.