Use spring-javaformat to format and check code

Resolves: #1450

spring-session-docs/src/test/java/docs/SpringHttpSessionConfig.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2017 the original author or authors.
+ * Copyright 2014-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,9 +27,11 @@ import org.springframework.session.config.annotation.web.http.EnableSpringHttpSe
 @EnableSpringHttpSession
 @Configuration
 public class SpringHttpSessionConfig {
+
 	@Bean
 	public MapSessionRepository sessionRepository() {
 		return new MapSessionRepository(new ConcurrentHashMap<>());
 	}
+
 }
 // end::class[]