[css-counter-styles-3][editorial] Fixed Bikeshed warnings

Author: SebastianZ

css-counter-styles-3/Overview.bs

@@ -941,7 +941,7 @@ Zero-Padding and Constant-Width Representations: the '@counter-style/pad' descri
 	<pre class='descdef'>
 	Name: pad
 	For: @counter-style
-	Value: <<integer [0,&infin;]>> && <<symbol>>
+	Value: <<integer [0,∞]>> && <<symbol>>
 	Initial: 0 ""
 	</pre>
 
@@ -950,7 +950,7 @@ Zero-Padding and Constant-Width Representations: the '@counter-style/pad' descri
 	Representations larger than the specified pad value are constructed as normal.
 
 	<dl>
-		<dt><<integer [0,&infin;]>> &amp;&amp; <<symbol>>
+		<dt><<integer [0,∞]>> &amp;&amp; <<symbol>>
 		<dd>
 			The <<integer>> specifies a minimum length that all counter representations must reach.
 
@@ -1059,7 +1059,7 @@ Marker characters: the '@counter-style/symbols' and '@counter-style/additive-sym
 	<pre class='descdef'>
 	Name: additive-symbols
 	For: @counter-style
-	Value: [ <<integer [0,&infin;]>> &amp;&amp; <<symbol>> ]#
+	Value: [ <<integer [0,∞]>> &amp;&amp; <<symbol>> ]#
 	Initial: n/a
 	</pre>