Remove trailing whitespace in Java source code

spring-web/src/test/java/org/springframework/http/client/OkHttpAsyncClientHttpRequestFactoryTests.java

@@ -24,7 +24,7 @@ import org.springframework.http.HttpMethod;
  * @author Luciano Leggieri
  */
 public class OkHttpAsyncClientHttpRequestFactoryTests extends AbstractAsyncHttpRequestFactoryTestCase {
-  
+ 
     @Override
     protected AsyncClientHttpRequestFactory createRequestFactory() {
         return new OkHttpClientHttpRequestFactory();