fix code formatting

README.md

@@ -40,6 +40,7 @@ The site_url() will always be the location where you can reach the site by tacki
 
 Put this in wp-config.php for debugging
 
+```
  // Enable WP_DEBUG mode
 define('WP_DEBUG', true);
 
@@ -60,6 +61,7 @@ if ( true === WP_DEBUG ) {
         error_log( $log );
     }
 }
+```
 
 ## LDAP Plugin