Bootstrap 3: Span elements floating right in list-group-item do not consume vertical space

http://stackoverflow.com/questions/22868664/bootstrap-3-span-elements-floating-right-in-list-group-item-do-not-consume-vert

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>
<div class="container">
  <div class="list-group">
    <a href="#" class="list-group-item clearfix">
      <span class="glyphicon glyphicon-file"></span>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit.
      <span class="pull-right">
        <button class="btn btn-xs btn-info">CCS</button>
        <button class="btn btn-xs btn-warning">
          <span class="glyphicon glyphicon-trash"></span>
        </button>
      </span>
    </a>
  </div>
  <div class="list-group">
    <a href="#" class="list-group-item clearfix">
      <span class="fa fa-university"></span>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit.
      <span class="pull-right">
        <button class="btn btn-xs btn-info">CCS</button>
        <button class="btn btn-xs btn-warning">
          <span class="glyphicon glyphicon-trash"></span>
        </button>
      </span>
    </a>
  </div>
  <div class="list-group">
    <a href="#" class="list-group-item clearfix">
      <span class="glyphicon glyphicon-user"></span>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit.
      <span class="pull-right">
        <button class="btn btn-xs btn-info">CCS</button>
        <button class="btn btn-xs btn-warning">
          <span class="glyphicon glyphicon-trash"></span>
        </button>
      </span>
    </a>
  </div>
</div>