title: Crash on search with quote character
body: <p>I have a search field and the text is fired against CoreData using:</p>
  
  <pre><code>produkt.name CONTAINS[cd] %@
  </code></pre>
  
  <p>but this crashes when the user types <code>'</code>, because the <code>'</code> character messes up my query: </p>
  
  <blockquote>
    <p>Terminating app due to uncaught exception NSInvalidArgumentException<br>
    Reason: Unable to parse the format string produkt.name CONTAINS[cd].</p>
  </blockquote>
  
  <p>Isn't there an option in CoreData to handle that? I can't imagine that I have to escape it by myself?</p>