[css-syntax] Editorial fixes in the "CSS stylesheets" section.

Author: SimonSapin

css-syntax/Overview.html

@@ -12,7 +12,7 @@
 </a></p>
   <h1 class="p-name no-ref" id=title>CSS Syntax Module Level 3</h1>
   <h2 class="no-num no-toc no-ref" id=subtitle><span class=content>Editor's Draft,
-    <span class=dt-updated><span class=value-title title=20130724>24 July 2013</span></span></span></h2>
+    <span class=dt-updated><span class=value-title title=20130725>25 July 2013</span></span></span></h2>
   <div data-fill-with=spec-metadata><dl><dt>This version:<dd><a class=u-url href=http://dev.w3.org/csswg/css-syntax>http://dev.w3.org/csswg/css-syntax</a><dt>Editor's Draft:<dd><a href=http://dev.w3.org/csswg/css-syntax>http://dev.w3.org/csswg/css-syntax</a>
 <dt>Feedback:</dt>
     <dd><a href="mailto:www-style@w3.org?subject=%5Bcss-syntax%5D%20feedback">www-style@w3.org</a>
@@ -2716,7 +2716,7 @@ <h3 data-level=8.1 id=style-rules><span class=secno>8.1 </span><span class=conte
 
 <p>	The prelude of the qualified rule is parsed as a
 	<a href=http://dev.w3.org/csswg/selectors4/#selector-list>selector list</a>.
-	If the prelude does not successfully parse as a valid selector,
+	If this results in an <a href=http://dev.w3.org/csswg/selectors4/#invalid>invalid selector list</a>,
 	the entire style rule is invalid.
 
 <p>	The content of the qualified rule’s block is parsed as a
@@ -2748,7 +2748,7 @@ <h3 data-level=8.2 id=the-charset-rule><span class=secno>8.2 </span><span class=
 
 <pre class=prod><dfn data-dfn-type=production id=at-charset-rule>&lt;at-charset-rule&gt;</dfn> = @charset <a class=production data-autolink=link><var>&lt;string&gt;</var></a>;</pre>
 <p>	Additionally, an <a class=css data-autolink=maybe href=#charset>@charset</a> rule is invalid if it is not at the top-level of a stylesheet,
-	if it is not the very first rule of a stylesheet.
+	or if it is not the very first rule of a stylesheet.
 
 <p>	<a class=css data-autolink=maybe href=#charset>@charset</a> rules have an <dfn data-dfn-type=link id=encoding>encoding</dfn>,
 	given by the value of the <a class=production data-autolink=link><var>&lt;string&gt;</var></a>.

css-syntax/Overview.src.html

@@ -2604,7 +2604,7 @@ <h3>
 
 	The prelude of the qualified rule is parsed as a
 	<a href="http://dev.w3.org/csswg/selectors4/#selector-list">selector list</a>.
-	If the prelude does not successfully parse as a valid selector,
+	If this results in an <a href="http://dev.w3.org/csswg/selectors4/#invalid">invalid selector list</a>,
 	the entire style rule is invalid.
 
 	The content of the qualified rule’s block is parsed as a
@@ -2637,7 +2637,7 @@ <h3>
 	<pre class='prod'><dfn>&lt;at-charset-rule></dfn> = @charset <<string>>;</pre>
 
 	Additionally, an ''@charset'' rule is invalid if it is not at the top-level of a stylesheet,
-	if it is not the very first rule of a stylesheet.
+	or if it is not the very first rule of a stylesheet.
 
 	''@charset'' rules have an <dfn>encoding</dfn>,
 	given by the value of the <<string>>.