[css-scroll-snap] Step-by-step de-duping of re-snapping requirements. Step 3: Split off conditional so we don't have to repeat that either.

Author: fantasai

css-scroll-snap/Overview.bs

@@ -338,19 +338,14 @@ Scroll Snapping Rules: the 'scroll-snap-type' property {#scroll-snap-type}
     If the content changes
     such that the scroll container would no longer be <a>snapped</a>
     (e.g. content is added, moved, deleted, resized)
-    to the same snap position it was snapped to before the content change
+    the UA must re-evaluate the resulting <a>scroll position</a>,
+    and re-snap if required.
+    If the <a>scroll container</a> was <a>snapped</a> before the content change
     and that same snap position 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.
 
-    <!-- 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)
-    to the same snap position it was snapped to before the content change,
-    the scroll container must be re-snapped.
-
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