 class="argument">FILL</li>    <li class="argument">CONTENTS</li>  </ul>  <a class="source-link" href="https://shinmera.com/project/array-utils/blob/e71aaf14be270d4aa1e5ba6fa9319e2de776dda0/utils.lisp#L34">Source</a>  </header> <div class="docstring"><pre>Shifts a subset of array elements in either direction for a specified amount.
Optionally also extends the array and fills empty space with a given element.

N        --- The amount to be moved. If positive, things are shifted to the right. If
             