Polish "Wrap ternary operator within parentheses"

See gh-31076

spring-aop/src/test/java/org/springframework/aop/interceptor/ConcurrencyThrottleInterceptorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -95,7 +95,7 @@ public class ConcurrencyThrottleInterceptorTests {
 				ex.printStackTrace();
 			}
 			threads[i] = new ConcurrencyThread(proxy,
-					i % 2 == 0 ? new OutOfMemoryError() : new IllegalStateException());
+					(i % 2 == 0 ? new OutOfMemoryError() : new IllegalStateException()));
 			threads[i].start();
 		}
 		for (int i = 0; i < NR_OF_THREADS; i++) {