Reworded 'counters in elements with no boxes' section to avoid using 'no effect' twice in different ways.

Author: tabatkins

css3-lists/Overview.html

@@ -1710,7 +1710,8 @@ <h3 id=counters-without-boxes><span class=secno>8.2. </span> Counters in
 
   <p>Other methods of "hiding" elements, such as setting &lsquo;<code
    class=property>visibility</code>&rsquo; to &lsquo;<code
-   class=css>hidden</code>&rsquo;, must have no effect on counters.
+   class=css>hidden</code>&rsquo;, still cause the element to generate a box,
+   and so do not apply here.
 
   <h2 id=counter-function><span class=secno>9. </span> Printing Counters: the
    &lsquo;<code class=css>counter()</code>&rsquo; and &lsquo;<code

css3-lists/Overview.src.html

@@ -1015,7 +1015,7 @@ <h3 id='counters-without-boxes'>
 h2.secret { display: none; }</pre>
 	</div>
 
-	<p>Other methods of "hiding" elements, such as setting 'visibility' to ''hidden'', must have no effect on counters.</p>
+	<p>Other methods of "hiding" elements, such as setting 'visibility' to ''hidden'', still cause the element to generate a box, and so do not apply here.</p>
 
 
 <h2 id='counter-function'>