[css-scroll-snap] Fix copy-paste errors

Author: fantasai

css-scroll-snap/Overview.bs

@@ -177,8 +177,8 @@ Scroll Snapping Model {#snap-model}
 
 	<a>Snap positions</a> are specified
 	as a particular alignment ('scroll-snap-align')
-	of an element's <a>scroll snap area</a>
-	(its border box, as modified by 'scroll-snap-margin')
+	of a box’s <a>scroll snap area</a>
+	(its border bounding box, as modified by 'scroll-snap-margin')
 	within the <a>scroll container</a>’s <a>snap window</a>
 	(its visual viewport, as reduced by 'scroll-snap-padding').
 	This is conceptually equivalent to specifying the alignment of
@@ -312,7 +312,7 @@ Scroll Snapping Rules: the 'scroll-snap-type' property {#snap-type}
 
 	A box <dfn export>captures snap positions</dfn>
 	if it is a <a>scroll container</a>
-	or has a value other than ''scroll-snap-type/none'' for 'scroll-snap-type'.
+	<em>or</em> has a value other than ''scroll-snap-type/none'' for 'scroll-snap-type'.
 	If a box's nearest <a lt="captures snap positions">snap-position capturing</a> ancestor
 	on its <a>containing block chain</a>
 	is a <a>scroll container</a> with a non-''scroll-snap-type/none'' value for 'scroll-snap-type',
@@ -1096,8 +1096,8 @@ Flow-relative Longhands for 'scroll-snap-padding'  {#padding-longhands-logical}
 	Media: interactive
 	</pre>
 
-	These <a>shorthands</a> of 'scroll-snap-margin-block-start' + 'scroll-snap-margin-block-end'
-	and 'scroll-snap-margin-inline-start' + 'scroll-snap-margin-inline-end'
+	These <a>shorthands</a> of 'scroll-snap-padding-block-start' + 'scroll-snap-padding-block-end'
+	and 'scroll-snap-padding-inline-start' + 'scroll-snap-padding-inline-end'
 	are <a>longhands</a> of 'scroll-snap-padding', and
 	specify the block-axis and inline-axis
 	edges of the <a>snap window</a>,
@@ -1154,8 +1154,8 @@ Flow-relative Longhands for 'scroll-snap-margin'  {#area-longhands-logical}
 	Media: interactive
 	</pre>
 
-	These <a>shorthands</a> of 'scroll-snap-margin-block-start'/'scroll-snap-margin-block-end'
-	and 'scroll-snap-margin-inline-start'/'scroll-snap-margin-inline-end'
+	These <a>shorthands</a> of 'scroll-snap-margin-block-start' + 'scroll-snap-margin-block-end'
+	and 'scroll-snap-margin-inline-start' + 'scroll-snap-margin-inline-end'
 	are <a>longhands</a> of 'scroll-snap-margin', and specify
 	the block-axis and inline-axis
 	edges of the <a>scroll snap area</a>,