minor formatting cleanup

spark-java/src/main/java/com/baeldung/sparkjava/HelloWorldService.java

@@ -1,12 +1,13 @@
 package com.baeldung.sparkjava;
+
 import static spark.Spark.*;
 
 public class HelloWorldService {
     public static void main(String[] args) {
-        get("/hello", (req,res)->"Hello, Baeldung");
-        
-        get("/hello/:name", (req,res)->{
-            return "Hello: "+ req.params(":name");
+        get("/hello", (req, res) -> "Hello, Baeldung");
+
+        get("/hello/:name", (req, res) -> {
+            return "Hello: " + req.params(":name");
         });
     }
 }