Polish documentation regarding target class proxying

Closes gh-12196

Author: wilkinsona

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/aop/AopAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -32,8 +32,8 @@
  * configuration.
  * <p>
  * The configuration will not be activated if {@literal spring.aop.auto=false}. The
- * {@literal proxyTargetClass} attribute will be {@literal false}, by default, but can be
- * overridden by specifying {@literal spring.aop.proxyTargetClass=true}.
+ * {@literal proxyTargetClass} attribute will be {@literal true}, by default, but can be
+ * overridden by specifying {@literal spring.aop.proxy-target-class=false}.
  *
  * @author Dave Syer
  * @author Josh Long

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/aop/AopAutoConfigurationTests.java

@@ -75,7 +75,7 @@ public void aopWithDisabledProxyTargetClass() {
 	}
 
 	@Test
-	public void aopWithCustomConfiguration() {
+	public void customConfigurationWithProxyTargetClassDefaultDoesNotDisableProxying() {
 		this.contextRunner.withUserConfiguration(CustomTestConfiguration.class)
 				.run(proxyTargetClassEnabled());
 	}
@@ -101,7 +101,7 @@ private ContextConsumer<AssertableApplicationContext> proxyTargetClassDisabled()
 		};
 	}
 
-	@EnableAspectJAutoProxy(proxyTargetClass = true)
+	@EnableAspectJAutoProxy
 	@Configuration
 	@Import(TestConfiguration.class)
 	protected static class CustomTestConfiguration {

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -4575,9 +4575,6 @@ TIP: It is also possible to transparently
 {spring-reference}integration.html#cache-annotations-evict[evict] data from the cache.
 
 
-NOTE: If you use the cache infrastructure with beans that are not interface-based, make
-sure to enable the `proxyTargetClass` attribute of `@EnableCaching`.
-
 
 === Supported Cache Providers
 The cache abstraction does not provide an actual store and relies on abstraction