--- a/README	Fri Nov 30 14:13:11 2018 +0000
+++ b/README	Sat Dec 01 15:09:37 2018 +0000
@@ -1,5 +1,6 @@
 scalac -Ydelambdafy:inline -d docdiff.jar docdiff.scala
 
+gerp -h     // gerp without filename
 
 
 given two lists, is one a sublist of the other except one