Editorial changes (#9143)

Review from https://github.com/w3c/csswg-drafts/pull/9028/files

css-view-transitions-1/Overview.bs

@@ -793,7 +793,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 	The ''::view-transition'' pseudo-element generates a new stacking context,
 	called the <dfn>view transition layer</dfn>,
 	which paints after all other content of the document
-	(including any content rendered in the 	[=Document/top layer=]),
+	(including any content rendered in the [=Document/top layer=]),
 	after any filters and effects that are applied to such content.
 	(It is not subject to such filters or effects,
 	except insofar as they affect the rendered contents
@@ -805,7 +805,7 @@ urlPrefix: https://wicg.github.io/navigation-api/; type: interface;
 	Therefore, the [=view transition layer=] is a sibling of all other content.
 
 	When a {{Document}}'s [=document/active view transition=]'s [=ViewTransition/phase=] is "`animating`",
-	any [=element=] in that {{Document}} that is [=captured in a view transition=] generates [=invisible=] boxes.
+	the boxes generated by any element in that {{Document}} with [=captured in a view transition=] are [=invisible=].
 
 # User Agent Stylesheet # {#ua-styles}