title: how to write a lua pattern for words with umlauts
body: <p>Words like "Annähren", "Überbringen", "Malmö" are not catched by</p>
  
  <pre><code>for w in string.gmatch(str, "%w+") do
       print(w) 
  end
  </code></pre>
  
  <p>Any solution? thanks!</p>