[css-snappoints] Updating resnap requirements to must for proximity in accordance with resolution https://lists.w3.org/Archives/Public/www-style/2016Jan/0145.html

Author: ChumpChief

css-snappoints/Overview.bs

@@ -232,7 +232,7 @@ Ignored Terms: scroll-snap-positions-*, containing block chain
         <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 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 must be satisfied after the content change.
+            When the visual viewport currently rests on a snap position, if the content changes such that the visual viewport would no longer rest on that 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) and if the user agent elects to modify the scroll offset to maintain snap position alignment, that same snap position must be satisfied after the content change.
     </dl>
 
 <h2 id="scroll-snap-padding">Scroll Snap Padding: the 'scroll-snap-padding' property</h2>