Prevent clang-format sorting some test includes

test/exception/containers.hpp

@@ -3,10 +3,13 @@
 // 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)
 
+// clang-format off
 #include "../helpers/prefix.hpp"
 #include <boost/unordered_map.hpp>
 #include <boost/unordered_set.hpp>
 #include "../helpers/postfix.hpp"
+// clang-format on
+
 #include "../objects/exception.hpp"
 
 typedef boost::unordered_set<