[css-contain-3][editorial] Address typo, ambiguous links, and status

Author: mirisuzanne

css-contain-3/Overview.bs

@@ -4,7 +4,7 @@ Level: 3
 Shortname: css-contain
 Status: ED
 Prepare for TR: no
-Work Status: Exploring
+Work Status: Revising
 Group: csswg
 ED: https://drafts.csswg.org/css-contain-3/
 TR: https://www.w3.org/TR/css-contain-3/
@@ -40,6 +40,7 @@ spec:css-sizing-3; type:property; text:height
 spec:css-sizing-3; type:dfn; text:height
 spec:css-sizing-3; type:dfn; text:size
 spec:css-values-4; type:dfn; text:relative length
+spec:css-values-4; type:dfn; text:identifier
 spec:web-animations-1; type:dfn; text:effect values
 </pre>
 
@@ -199,7 +200,7 @@ Inline-Size Containment</h3>
 		flush with the top of the container,
 		resulting a ''100px'' width,
 		plenty wide enough to accommodate its [=min-content size=].
-		However, due the 'aspect-ratio' of its child,
+		However, due to the 'aspect-ratio' of its child,
 		this would cause the <code>article</code> to be ''100px'' tall as well,
 		which would intersect the third float 80px below,
 		so this layout opportunity is discarded.