Fix typo.

Submitted by:	Larry Shatzer


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@273298 13f79535-47bb-0310-9956-ffa450edef68

proposal/sandbox/antlib/docs/manual/CoreTasks/antlib.html

@@ -131,7 +131,7 @@ A reference to an existing classpath.
 <pre>  &lt;antlib library=&quot;optional.jar&quot;/&gt;</pre>
 <p>loads the definitions from the library <code>optional.jar</code> 
 located at <code>${ant.home}/lib</code>.</p>
-<pre>  &lt;antlib file=&quot;${build}/lib/mylib.jar&quot&gt;
+<pre>  &lt;antlib file=&quot;${build}/lib/mylib.jar&quot;&gt;
     &lt;alias name=&quot;echo&quot; as=&quot;myecho&quot;/&gt;
   &lt;/antlib&gt;
 </pre>