diff -r ed7a9ea24f71 -r 195ad66315d9 core_testing2/docdiff_test2.scala
--- a/core_testing2/docdiff_test2.scala	Thu Nov 02 11:32:10 2023 +0000
+++ b/core_testing2/docdiff_test2.scala	Thu Nov 02 12:37:58 2023 +0000
@@ -1,6 +1,7 @@
 
-import C2._
+def urbanmain() = {
+  import C2._
 
-assert(occurrences(List("a", "b", "b", "c", "d")) == Map("a" -> 1, "b" -> 2, "c" -> 1, "d" -> 1))
-
-assert(occurrences(List("d", "b", "d", "b", "d")) == Map("d" -> 3, "b" -> 2))
+  assert(occurrences(List("a", "b", "b", "c", "d")) == Map("a" -> 1, "b" -> 2, "c" -> 1, "d" -> 1))
+  assert(occurrences(List("d", "b", "d", "b", "d")) == Map("d" -> 3, "b" -> 2))
+}