Fix names and use passed in variable

source

@@ -3803,8 +3803,8 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li><dfn data-x-href="https://w3c.github.io/aria/#dfn-role">role</dfn></li>
      <li><dfn data-x-href="https://w3c.github.io/aria/#dfn-accessible-name" data-x="concept-accessible-name">accessible name</dfn></li>
      <li>The <dfn data-x-href="https://w3c.github.io/aria/#ARIAMixin"><code>ARIAMixin</code></dfn> interface, with its associated
-             <dfn data-x-href="https://w3c.github.io/aria/#dfn-get-the-accessibility-idl-attribute">get the accessibility IDL attribute</dfn> and
-             <dfn data-x-href="https://w3c.github.io/aria/#dfn-set-the-accessibility-idl-attribute">set the accessibility IDL attribute</dfn> hooks</li>
+             <dfn data-x-href="https://w3c.github.io/aria/#dfn-ariamixin-getter-steps"><code>ARIAMixin</code> getter steps</dfn> and
+             <dfn data-x-href="https://w3c.github.io/aria/#dfn-ariamixin-setter-steps"><code>ARIAMixin</code> setter steps</dfn> hooks</li>
     </ul>
    </dd>
 
@@ -67408,12 +67408,12 @@ dictionary <dfn>ValidityStateFlags</dfn> {
   by this mixin are used to manipulate the <span data-x="internals-target">target element</span>'s
   <span>native accessibility semantics map</span>, as follows:</p>
 
-  <p id="dom-ElementInternals-accessibility-idl">To <span>get the accessibility IDL attribute</span>
-  for <code>ElementInternals</code>, given <var>internals</var>, <var>idlAttribute</var>, and
-  <var>contentAttribute</var>:</p>
+  <p id="dom-ElementInternals-accessibility-idl">The <span><code>ARIAMixin</code> getter
+  steps</span> for <code>ElementInternals</code>, given <var>internals</var>,
+  <var>idlAttribute</var>, and <var>contentAttribute</var>, are:</p>
 
   <ol>
-   <li><p>Let <var>map</var> be <span>this</span>'s <span data-x="internals-target">target
+   <li><p>Let <var>map</var> be <var>internals</var>'s <span data-x="internals-target">target
    element</span>'s <span>native accessibility semantics map</span>.</p></li>
 
    <li><p>If <var>map</var>[<var>contentAttribute</var>] <span data-x="map exists">exists</span>,
@@ -67422,12 +67422,12 @@ dictionary <dfn>ValidityStateFlags</dfn> {
    <li><p>Return null.</p></li>
   </ol>
 
-  <p>To <span>set the accessibility IDL attribute</span> for <code>ElementInternals</code>, given
+  <p>The <span><code>ARIAMixin</code> setter steps</span> for <code>ElementInternals</code>, given
   <var>internals</var>, <var>idlAttribute</var>, <var>contentAttribute</var>, and
-  <var>value</var>:</p>
+  <var>value</var>, are:</p>
 
   <ol>
-   <li><p>Let <var>map</var> be <span>this</span>'s <span data-x="internals-target">target
+   <li><p>Let <var>map</var> be <var>internals</var>'s <span data-x="internals-target">target
    element</span>'s <span>native accessibility semantics map</span>.</p></li>
 
    <li><p>If <var>value</var> is null, then <span data-x="map remove">remove</span>