[css-contain-3][editorial] Cleanup language for previous commits

Author: mirisuzanne

css-contain-3/Overview.bs

@@ -876,18 +876,18 @@ Style Container Features</h3>
 	the [=computed value=] of the given property on the [=query container=]
 	matches the given value
 	(which is also [=computed value|computed=] with respect to the [=query container=]),
-	unknown if the property or its value is unsupported,
+	unknown if the property or its value is invalid or unsupported,
 	and false otherwise.
 	The boolean syntax and logic combining [=style features=] into a <<style-query>>
 	is the same as for [=CSS feature queries=].
 	(See ''@supports''. [[!CSS-CONDITIONAL-3]])
 
 	[=Style features=] that query a [=shorthand property=] are true if the
-	[=computed values=] match for each expanded [=longhand property=],
+	[=computed values=] match for each of its [=longhand properties=],
 	and false otherwise.
 
 	[=Cascade-dependent keywords=], such as ''revert'' and ''revert-layer'',
-	are not allowed as values in a [=style feature=], and cause the
+	are invalid as values in a [=style feature=], and cause the
 	[=container style query=] to be false.
 
 	Note: The remaining non-cascade-dependent [=CSS-wide keywords=]