fix: move region tags

Author: Alan5142

appengine-java21/ee8/mail/src/main/java/com/example/appengine/mail/HandleDiscussionEmail.java

@@ -16,14 +16,15 @@
 
 package com.example.appengine.mail;
 
+// [START gae_java21_mail_discussion_email]
+
 import java.util.logging.Logger;
 import java.util.regex.Matcher;
 import javax.mail.internet.MimeMessage;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-// [START gae_java21_mail_discussion_email]
 public class HandleDiscussionEmail extends MailHandlerBase {
 
   private static final Logger log = Logger.getLogger(HandleDiscussionEmail.class.getName());

appengine-java21/ee8/mail/src/main/java/com/example/appengine/mail/MailHandlerBase.java

@@ -16,6 +16,8 @@
 
 package com.example.appengine.mail;
 
+// [START gae_java21_mail_handler_base]
+
 import java.io.IOException;
 import java.util.Properties;
 import java.util.regex.Matcher;
@@ -33,7 +35,6 @@
 import javax.servlet.http.HttpServletResponse;
 
 /** Base class for handling the filtering of incoming emails in App Engine. */
-// [START gae_java21_mail_handler_base]
 public abstract class MailHandlerBase implements Filter {
 
   private Pattern pattern = null;