diff -r de59aa20a1dc -r ffce7b61b446 main_testing4/knight_test3.scala
--- a/main_testing4/knight_test3.scala	Mon Nov 08 01:16:13 2021 +0000
+++ b/main_testing4/knight_test3.scala	Mon Nov 08 01:39:00 2021 +0000
@@ -1,4 +1,4 @@
-import CW9a._
+import M4a._
 
 //type Pos = (Int, Int)    // a position on a chessboard 
 //type Path = List[Pos]    // a path...a list of positions