Set clang-format standard to C++11 (#1820)

extras/tests/TextFormatter/writeFloat.cpp

@@ -17,7 +17,7 @@ template <typename TFloat>
 void check(TFloat input, const std::string& expected) {
   std::string output;
   Writer<std::string> sb(output);
-  TextFormatter<Writer<std::string> > writer(sb);
+  TextFormatter<Writer<std::string>> writer(sb);
   writer.writeFloat(input);
   REQUIRE(writer.bytesWritten() == output.size());
   CHECK(expected == output);