s="nav-item"><a class="nav-link d-none d-sm-block" href="#">Nav item 3</a></li>
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                <div class="card-footer">
                  <pre class="pre-scrollable"><code class="language-markup">&#x3C;!-- Source --&#x3E;
&#x3C;nav class=&#x22;navbar navbar-expand-xs&#x22;&#x3E;&#x3C;/nav&#x3E;</code></pre>
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              <div clas