title: Using bootstrap icons with button_to "delete" in rails 3
body: <p>I have this edit button: </p>
  
  <pre><code>&lt;%= link_to edit_income_path(trans), class: "btn btn-default" do %&gt;
  &lt;i class="glyphicon glyphicon-pencil"&gt;&lt;/i&gt;
  &lt;% end %&gt;
  </code></pre>
  
  <p>And I want a delete button to look the same with this icon: glyphicon glyphicon-trash, but I can't find the right syntax to make it work and look the same. My delete button now:</p>
  
  <pre><code>&lt;%= button_to "delete", trans, :method=&gt; :delete, :remote=&gt; true %&gt;
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/D2hub.jpg" alt="This is what it looks like"></p>