[css-scroll-snap] Fix errors in scroll-snap-points-x/y definitions

Author: fantasai

css-scroll-snap/Overview.bs

@@ -365,11 +365,11 @@ Scroll Snapping Coordinates: the 'scroll-snap-points-x' and 'scroll-snap-points-
 
 	<pre class="propdef">
 	Name: scroll-snap-points-x, scroll-snap-points-y
-	Value: none | repeat(<length>)
+	Value: none | repeat( [ <<length>> | <<percentage>> ])
 	Initial: start end
 	Applies to: <a>scroll containers</a>
 	Inherited: no
-	Percentages: relative to the size of the <a>scrollable area</a> in the appropriate axis
+	Percentages: relative to the size of the <a>snap target area</a> in the appropriate axis
 	Computed value: as specified, with lengths made absolute and clamped (see below)
 	Animatable: no
 	Media: interactive
@@ -385,12 +385,12 @@ Scroll Snapping Coordinates: the 'scroll-snap-points-x' and 'scroll-snap-points-
 			No <a>snap positions</a> are defined by this <a>scroll container</a>.
 			Contained elements may still define <a>snap positions</a> on this <a>scroll container's</a> behalf.
 
-		<dt><dfn>repeat(<<length>>)</dfn>
+		<dt><dfn>repeat([ <<length>> | <<percentage>> ])</dfn>
 		<dd>
 			Defines <a>snap position</a> that span the <a>scrollable area</a> in the appropriate axis,
 			starting from the <a>start</a> edge of the <a>scrollable area</a> and recurring every <<length>> distance throughout the <a>scrollable area</a>.
 
-			Negative <<length>>s are invalid.
+			Negative values are invalid.
 			User agents must define a UA-defined minimum <<length>> greater than 0
 			(recommended ''1px''),
 			and clamp the computed value to that minimum.