documented (not sufficiently, but its at least a start) the new nesting patternset and corrected copyright

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272044 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTypes/patternset.html

@@ -106,6 +106,9 @@ you can use to test the existance of a property.</p>
     <td align="center" valign="top">No</td>
   </tr>
 </table>
+<h4><code>patternset</code></h4>
+<p>Patternsets may be nested within one another, adding the nested
+patterns to the parent patternset.</p>
 <h3>Examples</h3>
 <blockquote><pre>
 &lt;patternset id=&quot;non.test.sources&quot; &gt;
@@ -160,7 +163,7 @@ that it should be used only if a property is not set.</p>
 <code>some-other-file</code> points to, if a property of that name has
 been defined.</p>
 <hr>
-<p align="center">Copyright &copy; 2001 Apache Software Foundation. All rights
+<p align="center">Copyright &copy; 2001-2002 Apache Software Foundation. All rights
 Reserved.</p>
 
 </body>

src/testcases/org/apache/tools/ant/types/PatternSetTest.java

@@ -1,7 +1,7 @@
 /*
  * The Apache Software License, Version 1.1
  *
- * Copyright (c) 2000-2001 The Apache Software Foundation.  All rights
+ * Copyright (c) 2000-2002 The Apache Software Foundation.  All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without