title: URLWithString: returns nil
body: <p>it may be very easy, but I don't seems to find out why is <code>URLWithString:</code> returning nil here.</p>
  
  <pre><code>//localisationName is a arbitrary string here
  NSString* webName = [localisationName stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 
  NSString* stringURL = [NSString stringWithFormat:@"http://maps.google.com/maps/geo?q=%@,Montréal,Communauté-Urbaine-de-Montréal,Québec,Canadae&amp;output=csv&amp;oe=utf8&amp;sensor=false&amp;key=", webName];
  NSURL* url = [NSURL URLWithString:stringURL];
  </code></pre>