Fix indentation; improve references & links

source

@@ -4056,6 +4056,8 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li>The <dfn data-x="event-scroll" data-x-href="https://drafts.csswg.org/cssom-view/#eventdef-document-scroll"><code>scroll</code></dfn> event</li>
      <li>The <dfn data-x="event-scrollend" data-x-href="https://drafts.csswg.org/cssom-view/#eventdef-document-scrollend"><code>scrollend</code></dfn> event</li>
      <li><dfn data-x-href="https://drafts.csswg.org/cssom-view/#set-up-browsing-context-features">set up browsing context features</dfn></li>
+     <li>The term <dfn data-x-href="https://drafts.csswg.org/cssom-view/#perform-a-scroll">perform a scroll</dfn></li>
+     <li>The term <dfn data-x-href="https://drafts.csswg.org/cssom-view/#scrolling-box">scrolling box</dfn></li>
     </ul>
 
     <p>The following features and terms are defined in <cite>CSS Syntax</cite>:
@@ -103883,22 +103885,26 @@ location.href = '#foo';</code></pre>
   </ol>
 
   <p>To <dfn>update the initial scroll positions for scroll containers</dfn> in a
-    <code>Document</code> <var>document</var>,
-    perform the following steps:</p>
+  <code>Document</code> <var>document</var>:</p>
 
     <ol>
-     <li><p>Let <var>scrollers</var> be the list of all
-      <span data-x="scroll container">scroll containers</span> within <var>document</var>.<p></li>
+     <li><p>Let <var>scrollers</var> be a <span>list</span> of all
+     <span data-x="scroll container">scroll containers</span> of <var>document</var>.<p></li>
 
      <li>
-      <p>For each scroller in <var>scrollers</var>:</p>
+      <p><span data-x="list iterate">For each</span> <var>scroller</var> of <var>scrollers</var>:
+      </p>
+
       <ol>
        <li><p>If the user agent has reason to believe the user is no longer interested in scrolling
-        to <var>scroller</var>'s <span data-x="initial scroll position">initial scroll
-          position</span>, then abort these steps.</p></li>
+       to <var>scroller</var>'s <span data-x="initial scroll position">initial scroll position
+       </span>, then abort these steps.</p></li>
+
+       <li><p>Let <var>position</var> be the <span data-x="initial scroll position">initial scroll
+       position</span> of <var>scroller</var>.</li>
 
-       <li><p>Update <var>scroller</var>'s <span data-x="initial scroll position">initial scroll
-        position</span> and scroll <var>scroller</var> to it.</p></li>
+       <li><p><span data-x="perform a scroll">Perform a scroll</span> of <var>scroller</var>'s <span
+       data-x="scrolling box">scrolling box</span> to <var>position</var>.</p></li>
       </ol>
      </li>
     </ol>