Ensure all files end with a newline

Update all files to ensure that they always end with a new line.

Issue: SPR-16968

spring-web/src/main/java/org/springframework/http/client/reactive/ClientHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -47,4 +47,4 @@ public interface ClientHttpRequest extends ReactiveHttpOutputMessage {
 	 */
 	MultiValueMap<String, HttpCookie> getCookies();
 
-}
+}