Fix missing close paragraph tag in previous commit.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1145424 13f79535-47bb-0310-9956-ffa450edef68

mapreduce/src/docs/src/documentation/content/xdocs/mapred_tutorial.xml

@@ -552,7 +552,7 @@
       and others.</p>
       
       <p>Finally, we will wrap up by discussing some useful features of the
-      framework such as the <code>DistributedCache</code>.
+      framework such as the <code>DistributedCache</code>.</p>
 
       <section>
         <title>Payload</title>