[css-pseudo-4] Allow overlay on inline-level boxes to cover its portion of the line box. #5395

Author: fantasai

css-pseudo-4/Overview.bs

@@ -565,6 +565,9 @@ Area of a Highlight
     
       The overlay may also include other other areas within the border-box of an element;
       in this case, those areas belong to the innermost such element that contains the area.
+    
+      For an [=inline-level box=], the overlay may extend outside its border edges
+      in the [=block axis=] as far as the edges of its [=line box=].
   
 
   Issue: See
@@ -970,6 +973,8 @@ Changes
     Added 'ruby-position' to properties allowed on ''::first-line'',
     analogous with 'text-emphasis-position'.
     (Issue 2998)
+    Allowed highlight overlay of inline-level boxes to extend to the line box edges.
+    (Issue 5395)
   
 
   Changes since the 7 June 2016 Working Draft include: