this is the commit message

test.cc

@@ -5,6 +5,7 @@ using namespace std;
 int main(int argc, char **argv) {
   cout << "it is a test of cpp!" << endl;
   cout << "the patch test of git" << endl;
-
+
+  std::cout << "test of commit --amend" << std::endl;
   return 0;
 }