[css-scroll-snap] Step-by-step de-duping of re-snapping requirements. Step 2: Merge re-snap to continuously-existing snap position requirement.

Author: fantasai

css-scroll-snap/Overview.bs

@@ -334,7 +334,7 @@ Scroll Snapping Rules: the 'scroll-snap-type' property {#scroll-snap-type}
     content in between can become inaccessible
     in cases where it is longer than the screen.
 
-    <!-- mandatory -->
+    <!-- mandatory and proximity -->
     If the content changes
     such that the scroll container would no longer be <a>snapped</a>
     (e.g. content is added, moved, deleted, resized)
@@ -350,10 +350,6 @@ Scroll Snapping Rules: the 'scroll-snap-type' property {#scroll-snap-type}
     (e.g. content is added, moved, deleted, resized)
     to the same snap position it was snapped to before the content change,
     the scroll container must be re-snapped.
-    If the same snap position it was snapped to before the content change
-    still exists (e.g. its associated element was not deleted) and is reachable,
-    the scroll container must be re-snapped to that same snap position
-    after the content change.
 
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