attributes attributes-small">
              <dt class="body-small">
               s
              </dt>
              <dd class="body-medium">
               <p>the Symbol inserted in place of the subexpression.</p> 
              </dd>
              <dt class="body-small">
               subexp
              </dt>
              <dd class="body-medium">
               <p>the subexpression to replace.</p> 
              </dd>
             </dl>
             <h2 class="h200">Attributes</h2>
             <dl 