Add "since" for nested <mapper>.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276230 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTasks/pathconvert.html

@@ -20,7 +20,8 @@ of files in a FileList into a path.
 <p>Nested <code>&lt;map&gt;</code> elements can be specified to map Windows
 drive letters to Unix paths, and vice-versa.</p>
 <p>More complex transformations can be achieved using a nested
-<a href="../CoreTypes/mapper.html"><code>&lt;mapper&gt;</code></a>.
+<a href="../CoreTypes/mapper.html"><code>&lt;mapper&gt;</code></a>
+(since Ant 1.6.2).
 </p>
 
 <h3>Parameters</h3>
@@ -120,7 +121,7 @@ prefixes of other <code>from</code> values.</i>
 <h4>mapper</h4>
 <p>A single nested <a href="../CoreTypes/mapper.html">
 <code>&lt;mapper&gt;</code></a> element can be specified
-to perform any of various filename transformations.
+to perform any of various filename transformations (since Ant 1.6.2).
 </p>
 
 <h3>Examples</h3>