External link symbol appearing when it should not?

[tmedwards]

The following apparently causes the external link symbol to appear on the anchors. Verify and investigate.

<div class="card-header">
  <ul class="nav nav-tabs nav-tabs-neutral justify-content-center" role="tablist" data-background-color="orange">
    <li class="nav-item">
      <a class="nav-link active" data-toggle="tab" href="#clothes" role="tab">Clothes</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" data-toggle="tab" href="#accessories" role="tab">Accessories</a>
    </li>
  </ul>
</div>