Fix javadoc.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@271618 13f79535-47bb-0310-9956-ffa450edef68

proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/filters/ExpandProperties.java

@@ -59,18 +59,16 @@ import java.io.Reader;
 import org.apache.tools.ant.Project;
 
 /**
- * Attach a prefix to every line
+ * Expand Ant properties, if any, in the data.
  *
  * Example:
  * =======
  *
- * <prefixlines prefix="Foo"/>
+ * <expandproperties/>
  *
  * Or:
  *
- * <filterreader classname="org.apache.tools.ant.filters.PrefixLines">
- *    <param name="prefix" value="Foo"/>
- * </filterreader>
+ * <filterreader classname="org.apache.tools.ant.filters.ExpandProperties"/>
  *
  * @author <a href="mailto:umagesh@apache.org">Magesh Umasankar</a>
  */