Sanatize.php: Update some doc

extension/qfq/qfq/helper/Sanitize.php

@@ -178,12 +178,12 @@ class Sanitize {
     } // safeFilename()
 
     /**
-     * Iterates over all elements of the given array and normalize the input. Only strings will be normalized.
-     * Sub arrays will be recursive normalized. Skip numeric content.
-     * Throws an exception for everything else.
+     * Take the given $item (or iterates over all elements of the given array) and normalize the content.
+     * Only strings will be normalized. Sub arrays will be recursived normalized. Numeric content is skipped.
+     * Throws an exception for unknown content.
      *
      * It's important to normalize the user input: e.g. someone is searching for a record and input the search string
-     * with composed characters.
+     * with composed characters (happens e.g. on Apple Mac / Safari without special user invention).
      *
      * @param array|string $item
      * @return array|string