Minor code style update

linux/SystemdMeter.c

@@ -221,7 +221,8 @@ static void updateViaExec(void) {
       close(fdnull);
       // Use of NULL in variadic functions must have a pointer cast.
       // The NULL constant is not required by standard to have a pointer type.
-      execlp("systemctl",
+      execlp(
+         "systemctl",
          "systemctl",
          "show",
          "--property=SystemState",