title: how to put icon in rails submit button
body: <p>I am using Bootstrap and want to put an icon in the submit button for a form.<br>
  here is the code:</p>
  
  <pre><code>&lt;%= f.submit "Submit for Approval &lt;i class='icon-share-alt icon-white'&gt;&lt;/i&gt;", 
                                  class: "button_green" %&gt;
  </code></pre>
  
  <p>Generated HTML:</p>
  
  <pre><code>&lt;input type="submit" value="Submit for Approval &amp;lt;i class='icon-share-alt icon-white'&amp;gt;&amp;lt;/i&amp;gt;" name="commit" class="button_green"&gt;
  </code></pre>
  
  <p>I tried adding both raw and html_safe to the text but neither one seemed to work.<br>
  I know one solution would be to have the class be an image with the icon in it already but I would like to do this without creating additional images/css. any suggestions?</p>