[css-snappoints] Adding text to clarify that the same snap position should be satisfied post-content modification, rather than just any snap position. Also 'specified value' -> 'as specified'

Author: ChumpChief

css-snappoints/Overview.bs

@@ -208,7 +208,7 @@ Ignored Terms: scroll-snap-positions-*, containing block chain
     Inherited: no
     Percentages: n/a
     Media: interactive
-    Computed value: specified value
+    Computed value: as specified
     Animatable: no
     </pre>
 
@@ -219,11 +219,15 @@ Ignored Terms: scroll-snap-positions-*, containing block chain
 
         <dt><dfn>mandatory</dfn>
         <dd>
-            The visual viewport of this <a>scroll container</a> is guaranteed to rest on a snap position when there are no active scrolling operations.  That is, it must come to rest on a snap position at the termination of a scroll, if a valid, reachable snap position exists.  If no valid, reachable snap position exists then no snapping occurs.  If the content changes such that the visual viewport would no longer rest on a snap position (e.g. content is added, moved, deleted, resized), the scroll offset must be modified to maintain this guarantee.
+            The visual viewport of this <a>scroll container</a> is guaranteed to rest on a snap position when there are no active scrolling operations.  That is, it must come to rest on a snap position at the termination of a scroll, if a valid, reachable snap position exists.  If no valid, reachable snap position exists then no snapping occurs.
+
+            If the content changes such that the visual viewport would no longer rest on a snap position (e.g. content is added, moved, deleted, resized), the scroll offset must be modified to maintain alignment of the visual viewport with a snap position.  If the visual viewport was already aligned with a snap position prior to the content change and that snap position still exists (e.g. its associated element was not deleted), that same snap position must be satisfied after the content change.
 
         <dt><dfn>proximity</dfn>
         <dd>
-            The visual viewport of this <a>scroll container</a> may come to rest on a snap position at the termination of a scroll at the discretion of the UA given the parameters of the scroll.  If the content changes such that the visual viewport would no longer rest on a snap position (e.g. content is added, moved, deleted, resized), the scroll offset may be modified to maintain this guarantee.
+            The visual viewport of this <a>scroll container</a> may come to rest on a snap position at the termination of a scroll at the discretion of the UA given the parameters of the scroll.
+
+            If the content changes such that the visual viewport would no longer rest on a snap position (e.g. content is added, moved, deleted, resized), the scroll offset may be modified to maintain alignment of the visual viewport with a snap position.  If the visual viewport was already aligned with a snap position prior to the content change and that snap position still exists (e.g. its associated element was not deleted) and if the user agent elects to modify the scroll offset to maintain snap position alignment, that same snap position should be satisfied after the content change.
     </dl>
 
 <h2 id="scroll-snap-padding">Scroll Snap Padding: the 'scroll-snap-padding' property</h2>
@@ -238,7 +242,7 @@ Ignored Terms: scroll-snap-positions-*, containing block chain
     Inherited: no
     Percentages: relative to the scroll container's visual viewport
     Media: interactive
-    Computed value: specified value, with lengths made absolute
+    Computed value: as specified, with lengths made absolute
     Animatable: yes
     </pre>
 
@@ -262,7 +266,7 @@ Ignored Terms: scroll-snap-positions-*, containing block chain
     Inherited: no
     Percentages: relative to the specified element box
     Media: interactive
-    Computed value: specified value, with lengths made absolute
+    Computed value: as specified, with lengths made absolute
     Animatable: yes
     </pre>