title: Font-awesome in `<fieldset>` with bootstrap 4 forms
body: <p>For single-input forms in bootstrap 4, a nice way to place font-awesome icons is the <code>input-group-addon</code> class:</p>
  
  <pre><code>&lt;div class="input-group"&gt;
      &lt;span class="input-group-addon"&gt;
          &lt;i class="fa fa-envelope"&gt;&lt;/i&gt;
      &lt;/span&gt;
      &lt;input class="form-control" type="text" placeholder="Email address"&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>which renders like this:</p>
  
  <p><a href="https://i.stack.imgur.com/86n9R.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/86n9R.png" alt="enter image description here"></a></p>
  
  <p>However, for multipart forms, it seems like bootstrap 4 is implicitly advising the use of the <code>&lt;fieldset&gt;</code> tag, but the natural extension of this idiom doesn't work:</p>
  
  <pre><code>&lt;form action="" method="POST"&gt;
      &lt;fieldset class="form-group"&gt;
          &lt;span class="input-group-addon"&gt;
              &lt;i class="fa fa-envelope"&gt;&lt;/i&gt;
          &lt;/span&gt;
          &lt;input class="form-control" type="text" placeholder="Email address"&gt;
      &lt;/fieldset&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>and it renders with the icon on top:</p>
  
  <p><a href="https://i.stack.imgur.com/qgkPG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qgkPG.png" alt="enter image description here"></a></p>
  
  <p>Is there a way to get the icon to set to the left of the field without writing custom css?</p>