Fixing tests for implicit return

previous commit affected rather many test, as the implicit returns add extra instructions
Also added some explicit returns, so as not to test the return logic too much. return (ie return nl) is a knonwn 3 risc operation.

test/rubyx/parfait/test_object.rb

@@ -5,21 +5,20 @@ module RubyX
   class TestObjecCompile < MiniTest::Test
     include ParfaitHelper
     def source
-      load_parfait(:object2)
+      load_parfait(:object)
     end
     def test_load
       assert source.include?("class Object")
       assert source.length > 2000
     end
-    def est_vool
+    def test_vool
       vool = compiler.ruby_to_vool source
       assert_equal Vool::ClassStatement , vool.class
       assert_equal :Object , vool.name
     end
-    def est_mom
+    def test_mom
       vool = compiler.ruby_to_mom source
-      assert_equal Vool::ClassStatement , vool.class
-      assert_equal :Object , vool.name
+      assert_equal Mom::MomCollection , vool.class
     end
   end
 end