[css-syntax-3] Make the ;-interruption *only* apply when parsing rules in a style block, not generally.

Author: tabatkins

css-syntax-3/Overview.bs

@@ -2545,7 +2545,9 @@ Consume an at-rule</h4>
 <h4 id="consume-qualified-rule">
 Consume a qualified rule</h4>
 
-	To <dfn>consume a qualified rule</dfn>:
+	To <dfn>consume a qualified rule</dfn>,
+	given an optional |mixed with declarations| boolean
+	(defaulting to false):
 
 	Create a new qualified rule
 	with its prelude initially set to an empty [=list=],
@@ -2555,11 +2557,20 @@ Consume a qualified rule</h4>
 
 	<dl>
 		<dt><<EOF-token>>
-		<dt><<semicolon-token>>
 		<dd>
 			This is a <a>parse error</a>.
 			Return nothing.
 
+		<dt><<semicolon-token>>
+		<dd>
+			If |mixed with declarations| is true,
+			this is a [=parse error=];
+			return nothing.
+
+			Otherwise,
+			append a <<semicolon-token>>
+			to the qualified rule's prelude.
+
 		<dt><a href="#tokendef-open-curly">&lt;{-token></a>
 		<dd>
 			<a>Consume a simple block</a>
@@ -2620,7 +2631,8 @@ Consume a style block's contents</h4>
 		<dt>anything else</dd>
 		<dd>
 			[=Reconsume the current input token=].
-			[=Consume a qualified rule=].
+			[=Consume a qualified rule=],
+			with |mixed with declarations| set to true.
 			If anything was returned,
 			append it to |rules|.
 	</dl>