[css-writing-modes] Cross link some more terms

Author: fantasai

css-writing-modes-3/Overview.bs

@@ -879,11 +879,12 @@ Block Flow Direction: the 'writing-mode' property</h3>
   <p>If a box has a different 'writing-mode' value than its parent box
     (i.e. nearest ancestor without ''display: contents''):
   <ul>
-   <li>If the box would otherwise become an in-flow box
+   <li>If the box would otherwise become an <a>in-flow</a> box
      with a computed 'display' of ''display/inline'',
      its 'display' computes instead to ''inline-block''.
-   <li>If the box is a block container,
-     then it establishes a new block formatting context.
+   <li>If the box is a <a>block container</a>,
+     then it establishes an <a lt="independent formatting context">independent</a>
+     <a>block formatting context</a>.
    <li>More generally, if its specified <a>inner display type</a> is ''flow'',
      then its computed <a>inner display type</a> becomes ''flow-root''. [[!CSS-DISPLAY-3]]
   </ul>

css-writing-modes-4/Overview.bs

@@ -956,11 +956,12 @@ Block Flow Direction: the 'writing-mode' property</h3>
   <p>If a box has a different 'writing-mode' value than its parent box
     (i.e. nearest ancestor without ''display: contents''):
   <ul>
-   <li>If the box would otherwise become an in-flow box
+   <li>If the box would otherwise become an <a>in-flow</a> box
      with a computed 'display' of ''display/inline'',
      its 'display' computes instead to ''inline-block''.
-   <li>If the box is a block container,
-     then it establishes a new block formatting context.
+   <li>If the box is a <a>block container</a>,
+     then it establishes an <a lt="independent formatting context">independent</a>
+     <a>block formatting context</a>.
    <li>More generally, if its specified <a>inner display type</a> is ''flow'',
      then its computed <a>inner display type</a> becomes ''flow-root''. [[!CSS-DISPLAY-3]]
   </ul>