diff -r 40657f9a4e4a -r 663c2a9108d1 pre_testing2/docdiff_test1.scala
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pre_testing2/docdiff_test1.scala	Sun Nov 01 01:21:31 2020 +0000
@@ -0,0 +1,6 @@
+
+import CW7a._
+
+assert(clean("ab a abc") == List("ab", "a", "abc"))
+
+assert(clean("ab*a abc1") == List("ab", "a", "abc1"))