title: NSLocalizedString with empty comment?
body: <p>i found this good example to use NSLocalizedString : <a href="https://stackoverflow.com/questions/1442822/what-is-second-param-of-nslocalizedstring">What is the second parameter of NSLocalizedString()?</a></p>
  
  <pre><code>NSLocalizedString(@"Save",@"Title of the Save button in the theme saving dialog");
  </code></pre>
  
  <p>.</p>
  
  <pre><code>/* Title of the Save button in the theme saving dialog */
  "Save" = "Save";
  </code></pre>
  
  <p>But what if the comment in NSLocalizedString is empty ?what does is mean? Will it automatically know where to find the translated word in localize.strings?</p>
  
  <p>Thanks</p>