Add missing section

media-source-respec.html

@@ -695,7 +695,7 @@ <h3><dfn>isTypeSupported()</dfn> method</h3>
             This method returning true implies that HTMLMediaElement.canPlayType() will return "maybe" or "probably" since it does not make sense for a <a>MediaSource</a> to support a type the HTMLMediaElement knows it cannot play.
           </p>
         <table class="parameters"><tbody><tr><th>Parameter</th><th>Type</th><th>Nullable</th><th>Optional</th><th>Description</th></tr><tr><th class="prmName">|type|</th><td class="prmType">{{DOMString}}</td><td class="prmNullFalse"><span role="img" aria-label="False">✘</span></td><td class="prmOptFalse"><span role="img" aria-label="False">✘</span></td><td class="prmDesc"></td></tr></tbody></table><div><em>Return type: </em>{{boolean}}</div></dd></dl>
-      </section>
+
 
       <section id="mediasource-events">
         <h3>Event Summary</h3>
@@ -1235,6 +1235,7 @@ <h4><dfn>Mirror if necessary</dfn></h4>
         </section>
       </section>
     </section>
+    </section>
 
     <section id="mediasourcehandle">
       <h2><dfn>MediaSourceHandle</dfn> interface</h2>