[css-break-3] Fix applies-to lines for break-*

Author: fantasai

css-break-3/Overview.bs

@@ -241,7 +241,7 @@ Breaks Between Boxes: the 'break-before' and 'break-after' properties</h3>
   Name: break-before, break-after
   Value: auto | avoid | avoid-page | page | left | right | recto | verso | avoid-column | column | avoid-region | region
   Initial: auto
-  Applies to: block-level elements, table row groups, table rows (but see prose)
+  Applies to: block-level boxes, grid items, flex items, table row groups, table rows (but see prose)
   Inherited: no
   </pre>
 
@@ -262,6 +262,7 @@ Breaks Between Boxes: the 'break-before' and 'break-after' properties</h3>
     User agents should also apply these properties to floated boxes
     whose containing block is in the normal flow of the root fragmented element.
     User agents may also apply these properties to other boxes.
+    User agents must not apply these properties to absolutely-positioned boxes.
   </p>
 
 <h4 id="generic-break-values" class="no-num">
@@ -394,8 +395,7 @@ Breaks Within Boxes: the 'break-inside' property</h3>
   Name: break-inside
   Value: auto | avoid | avoid-page | avoid-column | avoid-region
   Initial: auto
-  Applies to: elements in the normal flow that establish formatting contexts,
-      or that are block containers, table row groups, or table rows
+  Applies to: all elements except inline-level boxes, internal ruby boxes, table column boxes, table column group boxes, absolutely-positioned boxes
   Inherited: no
   </pre>