Polishing

spring-messaging/src/main/java/org/springframework/messaging/support/MessageHeaderAccessor.java

@@ -567,7 +567,7 @@ public class MessageHeaderAccessor {
 	 * of the given {@code Message}, or {@code null} if that's not available or if
 	 * its type does not match the required type.
 	 * <p>This is for cases where the existence of an accessor is strongly expected
-	 * (to be followed up with an assertion) or will created if not provided.
+	 * (followed up with an assertion) or where an accessor will be created otherwise.
 	 * @return an accessor instance of the specified type, or {@code null} if none
 	 * @since 4.1
 	 */