Editorial: Update text node definition (#2274)

Co-authored-by: Rahim Abdi <rahim_abdi@apple.com>
Co-authored-by: rahimabdi <rahimabdi@users.noreply.github.com>

Author: rahimabdi

accname/index.html

@@ -279,8 +279,8 @@ <h2>Name and Description</h2>
         </dd>
         <dt>contents</dt>
         <dd>
-          name is generated from the Text [=nodes=] associated with the [=element=]. Although this may be allowed in addition to "author" in some <a class="termref">roles</a>, "content" is used only
-          if higher priority "author" features are not provided. Priority is defined by the <a href="#mapping_additional_nd_te">text equivalent computation</a> algorithm.
+          name is generated from the [=exclusive Text node|text nodes=] associated with the [=element=]. Although this may be allowed in addition to "author" in some <a class="termref">roles</a>,
+          "content" is used only if higher priority "author" features are not provided. Priority is defined by the <a href="#mapping_additional_nd_te">text equivalent computation</a> algorithm.
         </dd>
         <dt>prohibited</dt>
         <dd>
@@ -700,8 +700,8 @@ <h4>Computation steps</h4>
                   </div>
                 </li>
                 <li id="comp_text_node">
-                  <span id="step2G"><!-- Don't link to this legacy numbered ID. --></span><em>Text Node:</em> Otherwise, if the <code>current node</code> is a Text [=Node=], return its textual
-                  contents.
+                  <span id="step2G"><!-- Don't link to this legacy numbered ID. --></span><em>Text Node:</em> Otherwise, if the <code>current node</code> is a [=exclusive Text node|text node=], return
+                  its textual contents.
                 </li>
                 <li id="comp_recursive_name_from_content">
                   <span id="step2H"><!-- Don't link to this legacy numbered ID. --></span><em>Recursive Name From Content:</em> Otherwise, if the <code>current node</code> is a descendant of an