1.6.2 version of class was not final

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277249 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/util/regexp/RegexpUtil.java

@@ -20,9 +20,7 @@ package org.apache.tools.ant.util.regexp;
  * Regular expression utilities class which handles flag operations.
  *
  */
-public final class RegexpUtil {
-    private RegexpUtil() {
-    }
+public class RegexpUtil {
 
     /**
      * Check the options has a particular flag set.