editorial tweak

Author: tabatkins

css3-images/Overview.html

@@ -1037,7 +1037,7 @@ <h4 class=no-toc id=radial-gradient-syntax><span class=secno>4.2.1. </span>
 
    <dd>Determines the center of the gradient. The <a
     href="#ltposition0"><i>&lt;position></i></a> notation is defined by the
-    positioning syntax of &lsquo;<code class=css><a
+    positioning syntax of a single layer of &lsquo;<code class=css><a
     href="http://www.w3.org/TR/css3-background/#the-background-position">background-position</a></code>&rsquo;
     and is resolved in the same way, using the center-point as the subject
     and the <a href="#gradient-box"><i>gradient box</i></a> as the

css3-images/Overview.src.html

@@ -639,7 +639,7 @@ <h4 class='no-toc' id='radial-gradient-syntax'>
 
 		<dt id='radial-position'><dfn>&lt;position></dfn></dt>
 		<dd>Determines the center of the gradient. The <i>&lt;position></i> notation
-		is defined by the positioning syntax of
+		is defined by the positioning syntax of a single layer of
 		'<a href="http://www.w3.org/TR/css3-background/#the-background-position">background-position</a>'
 		and is resolved in the same way, using the center-point as the subject and
 		the <i>gradient box</i> as the positioning area. [[!CSS21]] [[!CSS3BG]]