Correct ISO DateTime example

Issue: SPR-14675
(cherry picked from commit 68332bf)

Author: jhoeller

spring-context/src/main/java/org/springframework/format/annotation/DateTimeFormat.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -16,6 +16,7 @@
 
 package org.springframework.format.annotation;
 
+import java.lang.annotation.Documented;
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -28,19 +29,19 @@
  * Can be applied to {@code java.util.Date}, {@code java.util.Calendar}, {@code java.long.Long},
  * Joda-Time value types; and as of Spring 4 and JDK 8, to JSR-310 <code>java.time</code> types too.
  *
- * <p>For style-based formatting, set the {@link #style()} attribute to be the style pattern code.
+ * <p>For style-based formatting, set the {@link #style} attribute to be the style pattern code.
  * The first character of the code is the date style, and the second character is the time style.
  * Specify a character of 'S' for short style, 'M' for medium, 'L' for long, and 'F' for full.
  * A date or time may be omitted by specifying the style character '-'.
  *
- * <p>For ISO-based formatting, set the {@link #iso()} attribute to be the desired {@link ISO} format,
+ * <p>For ISO-based formatting, set the {@link #iso} attribute to be the desired {@link ISO} format,
  * such as {@link ISO#DATE}. For custom formatting, set the {@link #pattern()} attribute to be the
  * DateTime pattern, such as {@code yyyy/MM/dd hh:mm:ss a}.
  *
  * <p>Each attribute is mutually exclusive, so only set one attribute per annotation instance
  * (the one most convenient one for your formatting needs).
  * When the pattern attribute is specified, it takes precedence over both the style and ISO attribute.
- * When the iso attribute is specified, if takes precedence over the style attribute.
+ * When the {@link #iso} attribute is specified, it takes precedence over the style attribute.
  * When no annotation attributes are specified, the default format applied is style-based
  * with a style code of 'SS' (short date, short time).
  *
@@ -49,8 +50,9 @@
  * @since 3.0
  * @see org.joda.time.format.DateTimeFormat
  */
-@Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE})
+@Documented
 @Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE})
 public @interface DateTimeFormat {
 
 	/**
@@ -80,23 +82,23 @@
 	/**
 	 * Common ISO date time format patterns.
 	 */
-	public enum ISO {
+	enum ISO {
 
 		/**
 		 * The most common ISO Date Format {@code yyyy-MM-dd},
-		 * e.g. 2000-10-31.
+		 * e.g. "2000-10-31".
 		 */
 		DATE,
 
 		/**
 		 * The most common ISO Time Format {@code HH:mm:ss.SSSZ},
-		 * e.g. 01:30:00.000-05:00.
+		 * e.g. "01:30:00.000-05:00".
 		 */
 		TIME,
 
 		/**
 		 * The most common ISO DateTime Format {@code yyyy-MM-dd'T'HH:mm:ss.SSSZ},
-		 * e.g. 2000-10-31 01:30:00.000-05:00.
+		 * e.g. "2000-10-31T01:30:00.000-05:00".
 		 * <p>This is the default if no annotation value is specified.
 		 */
 		DATE_TIME,