Restore early return for history.go(0)

This accidentally was lost in 0a97a81.

source

@@ -90609,7 +90609,7 @@ interface <dfn interface>History</dfn> {
    <span>"<code>SecurityError</code>"</span> <code>DOMException</code>.</p></li>
 
    <li><p>If <var>delta</var> is 0, then <span>reload</span> <var>document</var>'s <span>node
-   navigable</span>.</p></li>
+   navigable</span>, and return.</p></li>
 
    <li><p><span>Traverse the history by a delta</span> given <var>document</var>'s <span>node
    navigable</span>'s <span data-x="nav-traversable">traversable navigable</span>, <var>delta</var>,