ICU-20919 Merge maint/maint-66 into master

diff --git a/tools/cldr/cldr-to-icu/lib/README.txt b/tools/cldr/cldr-to-icu/lib/README.txt
index c25f75b..c41c27b 100644
--- a/tools/cldr/cldr-to-icu/lib/README.txt
+++ b/tools/cldr/cldr-to-icu/lib/README.txt
@@ -59,5 +59,18 @@
 
 $ mvn dependency:purge-local-repository -DsnapshotsOnly=true
 
-If you choose to update the version number of the snapshot, then remember to update the
-root pom.xml, but this is unlikely to be necessary.
+After doing this, you should see something like the following list of files in this
+directory:
+
+README.txt   <-- this file
+org/unicode/cldr/cldr-api/maven-metadata-local.xml
+org/unicode/cldr/cldr-api/0.1-SNAPSHOT/maven-metadata-local.xml
+org/unicode/cldr/cldr-api/0.1-SNAPSHOT/cldr-api-0.1-SNAPSHOT.pom
+org/unicode/cldr/cldr-api/0.1-SNAPSHOT/cldr-api-0.1-SNAPSHOT.jar
+com/ibm/icu/icu-utilities/maven-metadata-local.xml
+com/ibm/icu/icu-utilities/0.1-SNAPSHOT/maven-metadata-local.xml
+com/ibm/icu/icu-utilities/0.1-SNAPSHOT/icu-utilities-0.1-SNAPSHOT.jar
+com/ibm/icu/icu-utilities/0.1-SNAPSHOT/icu-utilities-0.1-SNAPSHOT.pom
+
+Finally, if you choose to update the version number of the snapshot, then remember to
+update the root pom.xml, but this is unlikely to be necessary.