ICU-21237 Copyright fix
diff --git a/tools/cldr/cldr-to-icu/src/test/java/org/unicode/icu/tool/cldrtoicu/ant/CleanOutputDirectoryTaskTest.java b/tools/cldr/cldr-to-icu/src/test/java/org/unicode/icu/tool/cldrtoicu/ant/CleanOutputDirectoryTaskTest.java
index bc8d854..08962fc 100644
--- a/tools/cldr/cldr-to-icu/src/test/java/org/unicode/icu/tool/cldrtoicu/ant/CleanOutputDirectoryTaskTest.java
+++ b/tools/cldr/cldr-to-icu/src/test/java/org/unicode/icu/tool/cldrtoicu/ant/CleanOutputDirectoryTaskTest.java
@@ -1,3 +1,5 @@
+// © 2020 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 package org.unicode.icu.tool.cldrtoicu.ant;
 
 import com.google.common.collect.ImmutableList;