explicitly refer to step 3.16 in change marker

Author: pchampin

index.html

@@ -1998,7 +1998,7 @@ <h3>Algorithm</h3>
           <div id="change_pr639" class="candidate correction">
             <span class="marker">Candidate Correction 8</span>
             <p>Simplify the algorithm by handling the <a>default base direction</a>
-              once and for all in this step, rather than in each iteration at the end of the next step.
+              once and for all in this step, rather than <a href="#alg-inv-defaul-base-dir">in each iteration</a>.
               For more information, refer to <a href="https://github.com/w3c/json-ld-api/issues/633">issue 633</a>. 
             </p>
           </div>
@@ -2123,7 +2123,7 @@ <h3>Algorithm</h3>
                   being processed.</li>
               </ol>
             </li>
-            <li class="changed">
+            <li id="alg-inv-defaul-base-dir" class="changed">
               <ins cite="#change_pr639"><em>(this step was removed by a <a href="#change_pr639">candidate correction</a>)</em></ins>
               <del cite="#change_pr639">
               Otherwise, if <var>active context</var> has a