simple left align for scrollIntoView()

Author: annevk

cssom-view/Overview.html

@@ -847,7 +847,10 @@ <h3 id=element-scrolling-members><span class=secno>5.2. </span><code
      with the bottom of the scrolling box.
 
    <li>
-    <p class=XXX>left/right?
+    <p>Align the left of the border box of the element to be scrolled into
+     view with the left of the scrolling box.
+   </li>
+   <!-- RTL is not special cased in implementations?! -->
 
    <li>
     <p>If the aligning did not cause content to move terminate these steps.

cssom-view/Overview.src.html

@@ -666,7 +666,9 @@ <h3><code title="">Element</code> Scrolling Members</h3>
    align the bottom of the border box of the element to be scrolled into
    view with the bottom of the scrolling box.</p></li>
 
-   <li><p class="XXX">left/right?</p</li>
+   <li><p>Align the left of the border box of the element to be scrolled
+   into view with the left of the scrolling box.</p</li>
+   <!-- RTL is not special cased in implementations?! -->
 
    <li><p>If the aligning did not cause content to move terminate these
    steps.</p></li>