[css-cascade] Inject parenthetical into correct grammar construct. Remove mention of currently-nonexistent @else rule as an example.

Author: fantasai

css-cascade-3/Overview.bs

@@ -58,13 +58,14 @@ Importing Style Sheets: the ''@import'' rule</h2>
 	user agents must treat the contents of the stylesheet as if they were written in place of the ''@import'' rule,
 	with two exceptions:
 
-	* If a feature <em>explicitly</em> defines that it only applies to a particular stylesheet,
-		and not any imported ones
-		(such as the ''@namespace'' rule),
+	* If a feature
+		(such as the ''@namespace'' rule)
+		<em>explicitly</em> defines that it only applies to a particular stylesheet,
+		and not any imported ones,
 		then it doesn't apply to the imported stylesheet.
-	* If a feature relies on the relative position of two or more constructs in a stylesheet
-		(such as the requirement that an ''@else'' rule follow another <a>conditional group rule</a>,
-		or the requirement that ''@charset'' must not have any other content preceding it),
+
+	* If a feature relies on the relative ordering of two or more constructs in a stylesheet
+		(such as the requirement that ''@charset'' must not have any other content preceding it),
 		it only applies between constructs in the same stylesheet.
 
 	<p class='example'>

css-cascade-4/Overview.bs

@@ -68,13 +68,14 @@ Importing Style Sheets: the ''@import'' rule</h2>
 	user agents must treat the contents of the stylesheet as if they were written in place of the ''@import'' rule,
 	with two exceptions:
 
-	* If a feature <em>explicitly</em> defines that it only applies to a particular stylesheet,
-		and not any imported ones
-		(such as the ''@namespace'' rule),
+	* If a feature
+		(such as the ''@namespace'' rule)
+		<em>explicitly</em> defines that it only applies to a particular stylesheet,
+		and not any imported ones,
 		then it doesn't apply to the imported stylesheet.
-	* If a feature relies on the relative position of two or more constructs in a stylesheet
-		(such as the requirement that an ''@else'' rule follow another <a>conditional group rule</a>,
-		or the requirement that ''@charset'' must not have any other content preceding it),
+
+	* If a feature relies on the relative ordering of two or more constructs in a stylesheet
+		(such as the requirement that ''@charset'' must not have any other content preceding it),
 		it only applies between constructs in the same stylesheet.
 
 	<p class='example'>