[selectors-4] Don't mention :is(), since we dont' want to imply forgi…

…vingness. #10298

selectors-4/Overview.bs

@@ -2500,12 +2500,12 @@ The Current-element Pseudo-class: '':current''</h3>
 	The <dfn id='current-pseudo'>:current</dfn> pseudo-class represents the
 	element, or an ancestor of the element, that is currently being displayed.
 
-	Its alternate form <dfn>:current()</dfn>, like '':is()'',
-	takes a list of <a>compound selectors</a> as its argument: it represents the
-	'':current'' element that matches the argument or, if that does
-	not match, the innermost ancestor of the '':current'' element
-	that does. (If neither the '':current'' element nor its ancestors
-	match the argument, then the selector does not represent anything.)
+	Its alternate form <dfn>:current()</dfn> 
+	takes a list of <a>compound selectors</a> as its argument: 
+	it represents the '':current'' element that matches the argument 
+	or, if that does not match, 
+	the innermost ancestor of the '':current'' element that does. 
+	(If neither the '':current'' element nor its ancestors match the argument, then the selector does not represent anything.)
 
 	<div class="example">
 		For example, the following rule will highlight whichever paragraph