[cssom-view] Link mentions of "beginning edges" term

Author: cvrebert

cssom-view/Overview.bs

@@ -388,8 +388,8 @@ To <dfn>scroll to the beginning of the document</dfn> for a document <var>docume
 <ol>
  <li>Let <var>viewport</var> be the <a>viewport</a> that is associated with <var>document</var>. <!-- This assumes that there is a viewport, since
  it is only invoked when navigating -->
- <li>Let <var>position</var> be the the scroll position <var>viewport</var> would have by aligning the <span>beginning edges</span> of the
- <a>scrolling area</a> with the <span>beginning edges</span> of <var>viewport</var>.
+ <li>Let <var>position</var> be the the scroll position <var>viewport</var> would have by aligning the <a>beginning edges</a> of the
+ <a>scrolling area</a> with the <a>beginning edges</a> of <var>viewport</var>.
  <li>If <var>position</var> is the same as <var>viewport</var>'s current scroll position, and <var>viewport</var> does not have an ongoing
  <a>smooth scroll</a>, abort these steps.
  <li><a>Perform a scroll</a> of <var>viewport</var> to <var>position</var>,