diff -r 663c2a9108d1 -r 4de31fdc0d67 testing4/re_test6.scala
--- a/testing4/re_test6.scala	Sun Nov 01 01:21:31 2020 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,9 +0,0 @@
-import CW9c._
-
-val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))
-
-
-assert(simp(Iterator.iterate(ONE:Rexp)(r => SEQ(r, ONE | ONE)).drop(50).next) == ONE)
-assert(simp(Iterator.iterate(ONE:Rexp)(r => ALT(r, r)).drop(20).next) == ONE)
-assert(matcher(EVIL_urban, "a" * 1000000) == false)
-assert(matcher(EVIL_urban, "a" * 1000000 ++ "b") == true)