fix argument hoisting

arguments in vool must be simple variables
finally did the hoisting to do that

test/vool/normalization/helper.rb

@@ -0,0 +1,13 @@
+require_relative "../helper"
+
+module Vool
+  module Norm
+
+    class NormTest < MiniTest::Test
+
+      def normalize(input)
+        RubyCompiler.compile(input).normalize
+      end
+    end
+  end
+end

test/vool/normalization/test_send_statement.rb

@@ -0,0 +1,35 @@
+require_relative "helper"
+
+module Vool
+  module Norm
+
+    class TestSendSimple < NormTest
+      def test_simple
+        lst = normalize("foo")
+        assert_equal SendStatement , lst.class
+      end
+      def test_constant_args
+        lst = normalize("foo(1,2)")
+        assert_equal SendStatement , lst.class
+      end
+    end
+    class TestSendSend < NormTest
+      def setup
+        super
+        @stm = normalize("foo(1 - 2)")
+      end
+      def test_many
+        assert_equal Statements , @stm.class
+      end
+      def test_assignment
+        assert_equal LocalAssignment , @stm.first.class
+      end
+      def test_name
+        assert @stm.first.name.to_s.start_with?("tmp_") , @stm.first.name
+      end
+      def test_assigned
+        assert_equal SendStatement , @stm.first.value.class
+      end
+    end
+  end
+end