[css-syntax] Typo fix.

Author: SimonSapin

css-syntax/Overview.src.html

@@ -365,7 +365,7 @@ <h4 id="environment-encoding-xml">
 
 	<ul>
 		<li>
-			<a>Get an encoding</a> for the value of the <code>charset</code> <a href=http://www.w3.org/TR/xml-stylesheet/#dt-pseudo-attribute>pseudo-attribute</a> on processing instruction, if any.
+			<a>Get an encoding</a> for the value of the <code>charset</code> <a href=http://www.w3.org/TR/xml-stylesheet/#dt-pseudo-attribute>pseudo-attribute</a> of the processing instruction, if any.
 			If that does not return failure,
 			use the return value as the environment encoding.