refactor code style

dolphinscheduler-remote/src/main/java/org/apache/dolphinscheduler/remote/command/DBTaskAckCommand.java

@@ -29,7 +29,7 @@ public class DBTaskAckCommand implements Serializable {
     private int taskInstanceId;
     private int status;
 
-    public DBTaskAckCommand(int status,int taskInstanceId) {
+    public DBTaskAckCommand(int status, int taskInstanceId) {
         this.status = status;
         this.taskInstanceId = taskInstanceId;
     }
@@ -52,9 +52,10 @@ public class DBTaskAckCommand implements Serializable {
 
     /**
      * package response command
+     *
      * @return command
      */
-    public Command convert2Command(){
+    public Command convert2Command() {
         Command command = new Command();
         command.setType(CommandType.DB_TASK_ACK);
         byte[] body = JSONUtils.toJsonByteArray(this);