diff -r 6ba27d7cf416 -r 250e1d7df9ff testing3/re1b_test.scala
--- a/testing3/re1b_test.scala	Tue Nov 28 20:37:57 2017 +0000
+++ b/testing3/re1b_test.scala	Wed Nov 29 21:22:29 2017 +0000
@@ -1,18 +1,18 @@
 
-import scala.concurrent._
-import scala.concurrent.duration._
-import ExecutionContext.Implicits.global
-import scala.language.postfixOps 
-import scala.language.reflectiveCalls
+//import scala.concurrent._
+//import scala.concurrent.duration._
+//import ExecutionContext.Implicits.global
+//import scala.language.postfixOps 
+//import scala.language.reflectiveCalls
 
 
-lazy val f = Future {
+//lazy val f = Future {
   import CW8a._
 
   assert(der('a', ZERO | ONE) == (ZERO | ZERO))
   assert(der('a', (CHAR('a') | ONE) ~ CHAR('a')) == ALT((ONE | ZERO) ~ CHAR('a'), ONE))
   assert(der('a', STAR(CHAR('a'))) == (ONE ~ STAR(CHAR('a'))))
   assert(der('b', STAR(CHAR('a'))) == (ZERO ~ STAR(CHAR('a'))))
-}
+//}
 
-Await.result(f, 120 second)
+//Await.result(f, 120 second)