diff -r e9d14d58be3c -r daf561a83ba6 core_marking2/docdiff_test1.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core_marking2/docdiff_test1.scala	Mon Apr 11 23:55:27 2022 +0100
@@ -0,0 +1,4 @@
+import C2._
+
+assert(clean("ab a abc") == List("ab", "a", "abc"))
+assert(clean("ab*a abc1") == List("ab", "a", "abc1"))