[css-snappoints] Adding clarifying additions

Author: ChumpChief

css-snappoints/Overview.bs

@@ -253,7 +253,7 @@ Capturing Scroll Snap Areas:  Properties on the scroll container {#properties-on
 -->
 
 Scroll Snapping Rules: the 'scroll-snap-type' property {#scroll-snap-type}
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+--------------------------------------------------------------------------
 
     <pre class="propdef">
     Name: scroll-snap-type
@@ -287,13 +287,13 @@ Scroll Snapping Rules: the 'scroll-snap-type' property {#scroll-snap-type}
 
         <dt><dfn>mandatory</dfn>
         <dd>
-            The <a>scroll container</a> is required to be <a>snapped</a> when there are no active scrolling operations.  If a reachable snap position exists then the scroll container must <a>snap</a> at the termination of a scroll.  If no reachable snap position exists then no <a>snapping</a> occurs.
+            The <a>scroll container</a> is required to be <a>snapped</a> to a snap position when there are no active scrolling operations.  If a reachable snap position exists then the scroll container must <a>snap</a> at the termination of a scroll.  If no reachable snap position exists then no <a>snapping</a> occurs.
 
             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.  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.
 
         <dt><dfn>proximity</dfn>
         <dd>
-            The <a>scroll container</a> may snap at the termination of a scroll at the discretion of the UA given the parameters of the scroll.
+            The <a>scroll container</a> may <a>snap</a> to 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 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 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.
     </dl>