new i_to_s test

lib/virtual/machine.rb

@@ -135,7 +135,7 @@ module Virtual
     def compile_main bytes
       syntax  = @parser.parse_with_debug(bytes)
       parts = Parser::Transform.new.apply(syntax)
-      #puts parts.to_s
+      #puts parts.inspect
       Bosl::Compiler.compile( parts , @space.get_main )
     end