concatenate log messages

Author: pkaeding

src/main/java/com/launchdarkly/client/EventSource.java

@@ -497,7 +497,7 @@ public void run() {
       EventInput eventInput = null;
       try {
         try {
-          logger.debug("current state is {}", state.get());
+          logger.debug("current state is " + state.get());
           final Invocation.Builder request = prepareHandshakeRequest();
           if (state.get() == State.OPEN) { // attempt to connect only if even source is open
             logger.debug("Connecting...");