Fixed a missing tag

lang/en/docs/cvs.html

@@ -158,7 +158,7 @@ <h3><a name="4.2" id="4.2"></a>4.2 Stable branches for each release</h3>
     <blockquote>
       <p>As soon as the stable branch <span class="style3">MOODLE_XX_STABLE</span> is created, development efforts will fork into two streams for a while. Some people may continue working on new features in the trunk for the next release, but most developers should be concentrating on using the current <span class="style1"><strong>STABLE</strong></span> branch and fixing bugs that are found in it. </p>
       <p>You can switch your local copy of Moodle to the STABLE version using the following command in Unix from the root directory:</p>
-      <div class="commandline">cvs update -dP -r <span class="style1">MOODLE_XX_STABLE</div>
+      <div class="commandline">cvs update -dP -r <span class="style1">MOODLE_XX_STABLE</span></div>
       <p>After that, all the commands described above will apply to that stable version. To return to the trunk version just issue:</p>
       <div class="commandline">cvs update -dPA</div>
       <p>On Windows clients you should have a menu from which you can choose the branch. </p>