[css-syntax] make "plus sign" match other 2 items

when consuming a token, the first instruction for PLUS SIGN, HYPHEN-MINUS, and FULL STOP are all the same, but the PLUS SIGN instructions are missing a comma.

Author: skratchdot

css-syntax-3/Overview.bs

@@ -925,7 +925,7 @@ Consume a token</h4>
 		<dd>
 			If the input stream <a>starts with a number</a>,
 			<a>reconsume the current input code point</a>,
-			<a>consume a numeric token</a>
+			<a>consume a numeric token</a>,
 			and return it.
 
 			Otherwise,