[css-counter-styles] Fix bikeshed warnings about vars used only once.

Author: dbaron

css-counter-styles/Overview.bs

@@ -557,7 +557,7 @@ Positional Numerals: the ''numeric'' system</h4>
 	and <var>symbol(n)</var> be the nth <i>counter symbol</i> in the list of <i>counter symbols</i> (0-indexed).
 
 	<ol>
-		<li>If <var>value</var> is 0, append <var>symbol(0)</var> to
+		<li>If <var>value</var> is 0, append <code>symbol(0)</code> to
 		<var>S</var> and return <var>S</var>.
 
 		<li>While <var>value</var> is not equal to 0:
@@ -642,7 +642,7 @@ Accumulating Numerals: the ''additive'' system</h4>
 				<code>floor( <var>value</var> / <var><i>current tuple</i>’s weight</var> )</code>
 				times (this may be 0).
 
-				<li>Decrement <var>value</var> by the <var><i>current tuple</i>’s</var> weight multiplied
+				<li>Decrement <var>value</var> by the <var><i>current tuple</i>’s weight</var> multiplied
 				by the number of times the <i>current tuple</i> was appended to <var>S</var>
 				in the previous step.
 			</ol>