title: Empty alt with Rails image_tag
body: <p>I have a number of images that need an empty alt attribute, that is <code>alt=""</code>, using <code>image_tag</code>.</p>
  
  <p>I tried the code in the accepted answer at <a href="https://stackoverflow.com/questions/17115771/image-tag-is-there-a-way-to-make-the-alt-attr-blank-by-default">image_tag - Is there a way to make the alt attr blank by default?</a> but it results in <code>&lt;img alt&gt;</code> not <code>&lt;img alt=""&gt;</code>.</p>
  
  <p>Short of removing <code>image_tag</code> and using <code>img</code> can this be done?</p>