Remind user that JDK 1.4+ includes its own regexp impl

PR: 25709
Submitted by: Jesse Glick (jglick at netbeans dot org)


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@275834 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/install.html

@@ -269,7 +269,10 @@ the current Ant version in <code>ANT_HOME</code>.</p>
 <p>The following libraries are needed in your CLASSPATH or in the
 install directory's <code>lib</code> directory if you are using the
 indicated feature. Note that only one of the regexp libraries is
-needed for use with the mappers. You will also need to install the
+needed for use with the mappers
+(and Java 1.4 and higher includes a regexp implementation which
+Ant will find automatically).
+You will also need to install the
 Ant optional jar containing the task definitions to make these
 tasks available. Please refer to the <a href="#optionalTasks">
 Installing Ant / Optional Tasks</a> section above.</p>