diff -r ec9773fe1dc0 -r ef5f62bf5987 testing2/docdiff_test1.scala
--- a/testing2/docdiff_test1.scala	Tue Oct 29 14:34:51 2019 +0000
+++ b/testing2/docdiff_test1.scala	Tue Oct 29 23:56:13 2019 +0000
@@ -1,6 +1,6 @@
 
+import CW7a._
 
 assert(clean("ab a abc") == List("ab", "a", "abc"))
 
-
 assert(clean("ab*a abc1") == List("ab", "a", "abc1"))