Polish test code

Polish a few issue identified when adding checkstyle to the
build. Although checkstyle is not enforcing rules on tests,
these are a few minor changes that are still worth making.

Issue: SPR-16968

spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/ModelInitializerTests.java

@@ -214,7 +214,7 @@ public class ModelInitializerTests {
 				MethodIntrospector.selectMethods(controller.getClass(), BINDER_METHODS)
 						.stream()
 						.map(method -> new SyncInvocableHandlerMethod(controller, method))
-						.collect(Collectors.toList());;
+						.collect(Collectors.toList());
 
 		WebBindingInitializer bindingInitializer = new ConfigurableWebBindingInitializer();
 		return new InitBinderBindingContext(bindingInitializer, binderMethods);