Add missing format

src/core/perfmodel/perfmodel_history.c

@@ -963,7 +963,7 @@ int starpu_perfmodel_list(FILE *output)
         }
         else
 	{
-		_STARPU_DISP("Could not open the perfmodel directory <%s>: \n", path, strerror(errno));
+		_STARPU_DISP("Could not open the perfmodel directory <%s>: %s\n", path, strerror(errno));
         }
 	return 0;
 }