Polish 'Ignore JUnit annotations when caching test contexts'

See gh-28563

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/ImportsContextCustomizer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -386,7 +386,7 @@ class ImportsContextCustomizer implements ContextCustomizer {
 	}
 
 	/**
-	 * {@link AnnotationFilter} for Spock annotations.
+	 * {@link AnnotationFilter} for JUnit annotations.
 	 */
 	private static final class JunitAnnotationFilter implements AnnotationFilter {
 
@@ -396,4 +396,5 @@ class ImportsContextCustomizer implements ContextCustomizer {
 		}
 
 	}
+
 }