fixed the yaml output order for much better readability of failed tests

test/virtual/virtual_helper.rb

@@ -1,6 +1,5 @@
 require_relative '../helper'
 require 'parslet/convenience'
-require "yaml"
 
 module VirtualHelper
   # need a code generator, for arm 
@@ -20,3 +19,18 @@ module VirtualHelper
   end
   
 end
+
+require "yaml"   # not my first choice, but easy with graphs
+# for readability of the yaml output :next of instructions last
+
+Psych::Visitors::YAMLTree.class_eval do
+  private
+  def dump_ivars target
+    ivars = find_ivars target
+    ivars << :@next if ivars.delete(:@next)
+    ivars.each do |iv|
+      @emitter.scalar("#{iv.to_s.sub(/^@/, '')}", nil, nil, true, false, Psych::Nodes::Scalar::ANY)
+      accept target.instance_variable_get(iv)
+    end
+  end
+end