diff -r 97bcf8efe4e0 -r bb6074814a73 progs/hello-world.scala
--- a/progs/hello-world.scala	Fri Nov 06 01:07:26 2020 +0000
+++ b/progs/hello-world.scala	Sat Nov 07 19:13:06 2020 +0000
@@ -1,14 +1,3 @@
-object Hello //extends App 
-{ 
-  var x = 1 
-
-  println("test")
-
-  x = x + 2
-
-  println("foo")
-
-  synchronized { x = x + 1 }
-
+object Hello extends App { 
   println("hello world")
 }