add new line 2021-07-27-19:33

oneflow/core/job/runtime.cpp

@@ -174,4 +174,4 @@ void Runtime::DeleteAllGlobal() {
   Global<summary::EventsWriter>::Delete();
 }
 
-}  // namespace oneflow
\ No newline at end of file
+}  // namespace oneflow 
\ No newline at end of file