diff -r 3020f8c76baa -r 9e7897f25e13 testing4/re1a_test.scala
--- a/testing4/re1a_test.scala	Wed Nov 28 23:26:47 2018 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,21 +0,0 @@
-
-//import scala.concurrent._
-//import scala.concurrent.duration._
-//import ExecutionContext.Implicits.global
-//import scala.language.postfixOps 
-//import scala.language.reflectiveCalls
-
-//lazy val f = Future {
-  import CW8a._
-
-  assert(nullable(ZERO) == false)
-  assert(nullable(ONE) == true)
-  assert(nullable(CHAR('a')) == false)
-  assert(nullable(ZERO | ONE) == true)
-  assert(nullable(ZERO | CHAR('a')) == false)
-  assert(nullable(ONE ~  ONE) == true)
-  assert(nullable(ONE ~ CHAR('a')) == false)
-  assert(nullable(STAR(ZERO)) == true)
-//}
-
-//Await.result(f, 120 second)