title: Can't replacing string with string
body: <p>I have <code>UITableViewCell</code> with <code>detailTextLabel</code> which contains string that i want to replace with empty space(in other words to delete).It looks like this: </p>
  
  <pre><code>cell.detailTextLabel?.text = newsModel.pubDate
  </code></pre>
  
  <p>Now, the problem is that when i write <code>cell.detailTextLabel?.text?.stringByReplacingOccurrencesOfString("+0000", withString: " ")</code></p>
  
  <p>its not working and compiler says: </p>
  
  <blockquote>
    <p>"Result of call 
    'stringByReplacingOccurrencesOfString(_:withString:options:range:)' is
    unused"</p>
  </blockquote>
  
  <p>Anyone can tell me the solution?
  Thanks</p>