Make classList doc mention full set of manipulation methods (#8539)

Fixes #8538

Author: sideshowbarker

files/en-us/web/api/element/classlist/index.html

@@ -31,9 +31,7 @@ <h3 id="Returns">Returns</h3>
     it returns an empty <code>DOMTokenList</code>, i.e. a <code>DOMTokenList</code> with
     the <code>length</code> property equal to <code>0</code>.</p>
 
-<p>The <code>DOMTokenList</code> itself is read-only, although you can modify it using the
-    {{domxref("DOMTokenList/add", "add()")}} and {{domxref("DOMTokenList/remove",
-    "remove()")}} methods.</p>
+<p>Although the <code>classList</code> property itself is read-only, you can modify its associated <code>DOMTokenList</code> using the {{domxref("DOMTokenList/add", "add()")}}, {{domxref("DOMTokenList/remove", "remove()")}}, {{domxref("DOMTokenList/replace", "replace()")}}, and {{domxref("DOMTokenList/toggle", "toggle()")}} methods.</p>
 
 <h2 id="Examples">Examples</h2>