Cosmetics.

coupler/keep_alive_publisher.h

@@ -162,7 +162,7 @@ void callbackTicHeartBeat()
       int len1 = snprintf(NULL, 0, "%d", COUPLER_ID);
       char *result2 = malloc(len1 + 1);
       snprintf(result2, len1 + 1, "%d", COUPLER_ID);
-    
+
       // concat
       strcat(result2, ".");
       strcat(result2, result1);