title: how to use to_sentence for links?
body: <p>some thing like this:</p>
  
  <p>John send a message to user1, user2, user3 and user4</p>
  
  <p>this does not work</p>
  
  <pre><code>@users.collect{ |u| link_to(u.name, user_path(u)) }.to_sentence
  </code></pre>