diff -r 31b81f20fd9a -r fbff6f601370 main_testing3/re_test4.scala
--- a/main_testing3/re_test4.scala	Thu Nov 02 13:53:37 2023 +0000
+++ b/main_testing3/re_test4.scala	Thu Nov 02 23:34:53 2023 +0000
@@ -1,5 +1,10 @@
-import M3._
+
+def urbanmain() = {
+
+  import M3._
 
-assert(denest(List(ONE, ZERO, ALTs(List(ONE, CHAR('a'))))) 
-   == List(ONE, ONE, CHAR('a')))
-assert(denest(List(ONE ~ ONE, ZERO, ZERO | ONE)) == List(ONE ~ ONE, ZERO, ONE))
+  assert(denest(List(ONE, ZERO, ALTs(List(ONE, CHAR('a'))))) == List(ONE, ONE, CHAR('a')))
+  assert(denest(List(ONE ~ ONE, ZERO, ZERO | ONE)) == List(ONE ~ ONE, ZERO, ONE))
+
+
+}