disable code sniff for define check

inc/defines.php

@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Set up globally available constants
  */
@@ -73,7 +74,7 @@ define('DOKU_MEDIA_EMPTY_NS', 8);
  * @file inc/mail.php
  * @file inc/Mailer.class.php
  */
-if(!defined('MAILHEADER_EOL')) define('MAILHEADER_EOL', "\r\n");
+// phpcs:disable
+if (!defined('MAILHEADER_EOL')) define('MAILHEADER_EOL', "\r\n");
+// phpcs:enable
 // define('MAILHEADER_ASCIIONLY',1); // we currently don't use this
-
-