Editorial tweak of an example.

Author: tabatkins

css-variables/Overview.html

@@ -337,8 +337,8 @@ <h2 id=defining-variables><span class=secno>2. </span> Defining Variables
    <p>The preceding rule is equivalent to writing &lsquo;<code
     class=css>background-color: #06c;</code>&rsquo;, except that the variable
     name makes the origin of the color clearer, and if &lsquo;<code
-    class=css>data(header-color)</code>&rsquo; is used elsewhere in the
-    stylesheet, all of the uses can be updated at once by changing the
+    class=css>data(header-color)</code>&rsquo; is used on other elements in
+    the document, all of the uses can be updated at once by changing the
     &lsquo;<code class=property>data-header-color</code>&rsquo; property on
     the root element.</p>
   </div>

css-variables/Overview.src.html

@@ -141,7 +141,7 @@ <h2 id="defining-variables">
 
 		<pre>h1 { background-color: data(header-color); }</pre>
 
-		<p>The preceding rule is equivalent to writing ''background-color: #06c;'', except that the variable name makes the origin of the color clearer, and if ''data(header-color)'' is used elsewhere in the stylesheet, all of the uses can be updated at once by changing the 'data-header-color' property on the root element.</p>
+		<p>The preceding rule is equivalent to writing ''background-color: #06c;'', except that the variable name makes the origin of the color clearer, and if ''data(header-color)'' is used on other elements in the document, all of the uses can be updated at once by changing the 'data-header-color' property on the root element.</p>
 	</div>
 
 	<p>Data properties are ordinary properties, so they can be declared on any element, are resolved with the normal inheritance and cascade rules, can be made conditional with ''@media'' and other conditional rules, can be used in HTML's <code>style</code> attribute, can be read or set using the CSSOM, etc..</p>