Polish sample package names

spring-boot-samples/spring-boot-sample-data-mongodb/src/main/java/sample/data/mongo/SampleMongoApplication.java

@@ -29,7 +29,6 @@ public class SampleMongoApplication implements CommandLineRunner {
 
 	@Override
 	public void run(String... args) throws Exception {
-
 		this.repository.deleteAll();
 
 		// save a couple of customers
@@ -54,10 +53,10 @@ public class SampleMongoApplication implements CommandLineRunner {
 		for (Customer customer : this.repository.findByLastName("Smith")) {
 			System.out.println(customer);
 		}
-
 	}
 
 	public static void main(String[] args) throws Exception {
 		SpringApplication.run(SampleMongoApplication.class, args);
 	}
+
 }