Update copyright dates

test/core/buffer_cat.cpp

@@ -1,5 +1,5 @@
 //
-// Copyright (c) 2013-2016 Vinnie Falco (vinnie dot falco at gmail dot com)
+// Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
 //
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
@@ -240,7 +240,7 @@ public:
             ! detail::is_all_ConstBufferSequence<
                 const_buffers_1, mutable_buffers_1, int
             >::value, "");
-                    
+
         // Ensure that concatenating mutable buffer
         // sequences results in a mutable buffer sequence
         static_assert(std::is_same<