[broker-30] Cleanup code after merge

Author: crazyrokr

model/src/main/java/javasabr/mqtt/model/subscriber/tree/ConcurrentSubscriberTree.java

@@ -13,7 +13,6 @@
 import org.jspecify.annotations.Nullable;
 
 @FieldDefaults(level = AccessLevel.PRIVATE, makeFinal = true)
-
 public class ConcurrentSubscriberTree implements ThreadSafe {
 
   SubscriberNode rootNode;

model/src/main/java/javasabr/mqtt/model/subscriber/tree/SubscriberNode.java

@@ -44,7 +44,6 @@ public SingleSubscriber subscribe(int level, SubscriptionOwner owner, Subscripti
     if (level == topicFilter.levelsCount()) {
       return addSubscriber(getOrCreateSubscribers(), owner, subscription, topicFilter);
     }
-
     SubscriberNode childNode = getOrCreateChildNode(topicFilter.segment(level));
     return childNode.subscribe(level + 1, owner, subscription, topicFilter);
   }
@@ -53,7 +52,6 @@ public boolean unsubscribe(int level, SubscriptionOwner owner, TopicFilter topic
     if (level == topicFilter.levelsCount()) {
       return removeSubscriber(subscribers(), owner, topicFilter);
     }
-
     SubscriberNode childNode = getOrCreateChildNode(topicFilter.segment(level));
     return childNode.unsubscribe(level + 1, owner, topicFilter);
   }
@@ -86,7 +84,6 @@ private void singleWildcardTopicMatch(
       TopicName topicName,
       int lastLevel,
       MutableArray<SingleSubscriber> result) {
-
     SubscriberNode subscriberNode = childNode(TopicFilter.SINGLE_LEVEL_WILDCARD);
     if (subscriberNode == null) {
       return;
@@ -99,7 +96,6 @@ private void singleWildcardTopicMatch(
   }
 
   private void multiWildcardTopicMatch(MutableArray<SingleSubscriber> result) {
-
     SubscriberNode subscriberNode = childNode(TopicFilter.MULTI_LEVEL_WILDCARD);
     if (subscriberNode != null) {
       appendSubscribersTo(result, subscriberNode);

model/src/main/java/javasabr/mqtt/model/topic/TopicFilter.java

@@ -11,9 +11,9 @@
 public class TopicFilter extends AbstractTopic {
 
   public static final String MULTI_LEVEL_WILDCARD = "#";
-  public static final char MULTI_LEVEL_WILDCARD_CHAR = MULTI_LEVEL_WILDCARD.charAt(0);
+  public static final char MULTI_LEVEL_WILDCARD_CHAR = '#';
   public static final String SINGLE_LEVEL_WILDCARD = "+";
-  public static final char SINGLE_LEVEL_WILDCARD_CHAR = SINGLE_LEVEL_WILDCARD.charAt(0);
+  public static final char SINGLE_LEVEL_WILDCARD_CHAR = '+';
   public static final String SPECIAL = "$";
 
   public static final TopicFilter INVALID_TOPIC_FILTER = new TopicFilter("$invalid$") {

model/src/main/java/javasabr/mqtt/model/topic/tree/package-info.java

@@ -1,4 +1,4 @@
 @NullMarked
 package javasabr.mqtt.model.topic.tree;
 
-import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.NullMarked;