title: How to embed font-awesome icons into submit_tag
body: <p>Trying to user font awesome icons for my buttons but I cant get it to show in the submit_tag</p>
  
  <pre><code> &lt;%= submit_tag icon("search"), class: "btn-primary", style:"width:40px;" %&gt;
  </code></pre>
  
  <p>output:</p>
  
  <pre><code> &lt;input class="btn-primary" name="commit" style="width:40px;" type="submit" value="&amp;lt;i class='icon-search' style='font-size:1em' &amp;gt;&amp;lt;/i&amp;gt;"&gt;
  </code></pre>
  
  <p>helper:</p>
  
  <pre><code>def icon(name, size=1)
    #icon("camera-retro")
    #&lt;i class="icon-camera-retro"&gt;&lt;/i&gt; 
  
    html = "&lt;i class='icon-#{name}' "
    html += "style='font-size:#{size}em' "
    html += "&gt;&lt;/i&gt;"
    html.html_safe
  end
  </code></pre>
  
  <p>when I remove the html.html_safe line of the helper I get the same thing. its like html_safe is not working. I have also tried html = raw(html) with no effect either.</p>