Use concatenation instead of torn StringBuilder::append chain

spring-aop/src/main/java/org/springframework/aop/interceptor/AbstractMonitoringInterceptor.java

@@ -98,16 +98,12 @@ public abstract class AbstractMonitoringInterceptor extends AbstractTraceInterce
 	 * @see #setSuffix
 	 */
 	protected String createInvocationTraceName(MethodInvocation invocation) {
-		StringBuilder sb = new StringBuilder(getPrefix());
 		Method method = invocation.getMethod();
 		Class<?> clazz = method.getDeclaringClass();
 		if (this.logTargetClassInvocation && clazz.isInstance(invocation.getThis())) {
 			clazz = invocation.getThis().getClass();
 		}
-		sb.append(clazz.getName());
-		sb.append('.').append(method.getName());
-		sb.append(getSuffix());
-		return sb.toString();
+		return getPrefix() + clazz.getName() + '.' + method.getName() + getSuffix();
 	}
 
 }