clarified acc name calc for a element (#327)

Author: stevefaulkner

index.html

@@ -6538,7 +6538,7 @@ <h4><code>tr</code>, <code>td</code>, <code>th</code> Elements Accessible Descri
       </section>
     </section>
     <section>
-      <h3><code>a</code> Element</h3>
+      <h3><code>a</code> Element with a <code>href</code> attribute</h3>
       <section>
         <h4><code>a</code> Element Accessible Name Computation</h4>
         <ol>
@@ -6553,7 +6553,7 @@ <h4><code>a</code> Element Accessible Name Computation</h4>
         </ol>
       </section>
       <section>
-        <h4><code>a</code> Element Accessible Description Computation</h4>
+        <h4><code>a</code> Element with a <code>href</code> attribute Accessible Description Computation</h4>
         <ol>
           <li>
             If the element has an <a href="https://www.w3.org/TR/wai-aria-1.1/#aria-describedby"><code>aria-describedby</code></a> attribute the <a class="termref">accessible description</a> is to be calculated using the algorithm defined in <a href="" class="accname">Accessible Name and Description: Computation and API Mappings 1.1</a>.