[css-snappoints] Minor editorial changes to overview.

Author: ChumpChief

css-snappoints/Overview.src.html

@@ -161,10 +161,10 @@ <h2 id="overview">Overview</h2>
     This module introduces control over <a>scroll snap positions</a>,
     which are scroll positions that produce particular alignments
     of content within a scrollable viewport.
-    Using the 'scroll-snap-type' propoperty on the relevant <a>scroll container</a>,
+    Using the 'scroll-snap-type' property on the relevant <a>scroll container</a>,
     the author can request a particular bias
     for the viewport to land on a valid <a>snap position</a>
-    during scrolling operations.
+    after scrolling operations.
 
     Valid <a>snap positions</a> can be specified
     as a particular alignment ('scroll-snap-align')
@@ -173,7 +173,7 @@ <h2 id="overview">Overview</h2>
     (its viewport, as reduced by 'scroll-snap-padding').
     This is conceptually equivalent to specifying the alignment of
     an <a>alignment subject</a> within an <a>alignment container</a>.
-    The scroll position that satisfies the specified alignment
+    A scroll position that satisfies the specified alignment
     is a valid <a>snap position</a>.
 
     <a>Snap positions</a> must only affect the nearest ancestor