fixed typo and JavaDoc polishing.

org.springframework.web/src/main/java/org/springframework/web/bind/annotation/CookieValue.java

@@ -50,16 +50,17 @@ public @interface CookieValue {
 
 	/**
 	 * Whether the header is required.
-	 * <p>Default is <code>true</code>, leading to an exception thrown in case
-	 * of the header missing in the request. Switch this to <code>false</code>
-	 * if you prefer a <code>null</value> in case of the header missing.
+	 * <p>Default is <code>true</code>, leading to an exception being thrown
+	 * in case the header is missing in the request. Switch this to
+	 * <code>false</code> if you prefer a <code>null</value> in case of the
+	 * missing header.
 	 * <p>Alternatively, provide a {@link #defaultValue() defaultValue},
 	 * which implicitly sets this flag to <code>false</code>.
 	 */
 	boolean required() default true;
 
 	/**
-	 * The default value to use as a fallback. Supplying a default value implicitely
+	 * The default value to use as a fallback. Supplying a default value implicitly
 	 * sets {@link #required()} to false.
 	 */
 	String defaultValue() default "";