Only use accumulated text that is not empty ("")

index.html

@@ -271,7 +271,7 @@ <h4>Computation steps</h4>
                         <li id="step2B.ii.c">Append the <code>result</code>, with a space, to the <code>accumulated text</code>.</li>
                       </ol>
                     </li>
-                    <li id="step2B.iii">Return the <code>accumulated text</code>.</li>
+                    <li id="step2B.iii">Return the <code>accumulated text</code> if it is not the empty string ("").</li>
                   </ol>
                 </li>
               </ul>
@@ -350,7 +350,7 @@ <h4>Computation steps</h4>
                     <li id="step2F.iii.c">Append the <code>result</code> to the <code>accumulated text</code>. </li>
                   </ol>
                 </li>
-                <li id="step2F.iv">Return the <code>accumulated text</code>.</li>
+                <li id="step2F.iv">Return the <code>accumulated text</code> if it is not the empty string ("").</li>
               </ol>
               <p><strong>Important</strong>:  Each <a class="termref">node</a> in the subtree is consulted only once. If text has been collected from a descendant, but is referenced by another IDREF in some descendant node, then that second, or subsequent, reference is not followed. This is done to avoid infinite loops.  </p>
               <div><details>