--- a/README	Wed Feb 05 12:24:27 2020 +0000
+++ b/README	Fri Apr 10 12:12:48 2020 +0100
@@ -1,3 +1,29 @@
+Wartremover
+
+./wartremover -traverser org.wartremover.warts.Return -traverser org.wartremover.warts.Var -traverser org.wartremover.warts.MutableDataStructures $i
+
+
+compilation
+
+git clone https://github.com/wartremover/wartremover.git
+sbt "++ 2.13.1" core/assembly
+
+
+======================
+
+
+./dff > sort | more
+./dff | sort > d
+
+
+Repeating commands for data in a file:
+
+input="d"
+
+while IFS= read -r file; do opendiff some_copy "$file"; done < "$input"
+
+----------------------------
+
 Decompilation