title: How add css attributes in button_tag?
body: <p>I have next helper </p>
  
  <pre><code>= button_tag :type =&gt; "button", { "Add", :id =&gt; "poll-btn", :class =&gt; "btn-bg" }
  </code></pre>
  
  <p>Syntaxis is incorrect. How correct add css attributes(id, class) with type and content?  Sorry for very easy and stupid quation.   </p>