diff -r d7c9ef381437 -r 8d57433c7b5e progs/compile.scala
--- a/progs/compile.scala	Thu Nov 14 13:50:39 2019 +0000
+++ b/progs/compile.scala	Fri Nov 15 14:58:16 2019 +0000
@@ -119,7 +119,7 @@
 }
 
 // this allows you to write things like
-// i"add" and l"Lable"
+// i"add" and l"Label"
 
 
 // environments 
@@ -205,7 +205,7 @@
 // main compilation function for blocks
 def compile(bl: Block, class_name: String) : String = {
   val instructions = compile_block(bl, Map.empty)._1
-  (beginning ++ instructions.mkString ++ ending).replaceAllLiterally("XXX", class_name)
+  (beginning ++ instructions ++ ending).replaceAllLiterally("XXX", class_name)
 }
 
 
@@ -257,7 +257,7 @@
 
 // Fibonacci numbers as a bare-bone test-case
 val fib_test = 
-  List(Assign("n", Num(10)),            //  n := 10;                     
+  List(Assign("n", Num(9)),            //  n := 10;                     
        Assign("minus1",Num(0)),         //  minus1 := 0;
        Assign("minus2",Num(1)),         //  minus2 := 1;
        Assign("temp",Num(0)),           //  temp := 0;