Fix markup errors

webrtc.html

@@ -841,7 +841,7 @@ <h4>Operation</h4>
         so the modifications are made visible at a single point in time.</p>
 
         <p>As one of the <a>unloading document cleanup steps</a>, run the
-        following steps:</a>
+        following steps:</p>
         <ol>
           <li class="untestable">
             <p>Let <var>window</var> be <var>document</var>'s <a
@@ -1214,7 +1214,7 @@ <h4>Set the RTCSessionDescription</h4>
             <p data-tests="">In parallel, start the process to apply <var>description</var>
             as described in <span data-jsep=
             "processing-a-local-desc processing-a-remote-desc">[[!JSEP]]</span>,
-            with these additional restrictions:<p>
+            with these additional restrictions:</p>
             <ol>
               <li>
                 <p>Use <var>jsepSetOfTransceivers</var> as the source of truth
@@ -1917,7 +1917,6 @@ <h4>Set the RTCSessionDescription</h4>
                         {{RTCIceTransport}}s. This results in events firing on
                         these objects in a queued task.</p>
                       </li>
-                      </li>
                       <li data-tests="RTCPeerConnection-onnegotiationneeded.html">
                         <p>[= Clear the negotiation-needed flag =] and
                         [= update the negotiation-needed flag =].</p>
@@ -3274,7 +3273,7 @@ <h2>Methods</h2>
                   </li>
                   <li class="no-test-needed">
                     [= close the connection =] with <var>connection</var> and
-                    the value <code>false</code>.</p>
+                    the value <code>false</code>.
                   </li>
                 </ol>
                 <p>The <dfn>close the connection</dfn> algorithm given a