Slotted constructor cleanup

test/slot_machine/instruction/test_not_same_check.rb

@@ -3,7 +3,7 @@ require_relative "helper"
 module SlotMachine
   class TestNotSameCheck < SlotMachineInstructionTest
     def instruction
-      target = Slotted.for(:message , :caller)
+      target = Slotted.for(:message , [:caller])
       NotSameCheck.new(target , target , Label.new("ok" , "target"))
     end
     def test_len

test/slot_machine/instruction/test_truth_check.rb

@@ -3,7 +3,7 @@ require_relative "helper"
 module SlotMachine
   class TestSameCheck < SlotMachineInstructionTest
     def instruction
-      target = SlottedMessage.new( :caller)
+      target = SlottedMessage.new( [:caller])
       TruthCheck.new(target , Label.new("ok" , "target"))
     end
     def test_len

test/slot_machine/test_slotted.rb

@@ -3,13 +3,13 @@ require_relative "helper"
 module SlotMachine
   class TestSlotted < MiniTest::Test
     def test_to_s
-      assert_equal "message.caller" , SlottedMessage.new(:caller).to_s
+      assert_equal "message.caller" , SlottedMessage.new([:caller]).to_s
     end
     def test_for_mess
-      assert_equal 2 , SlottedMessage.new(:caller).slots_length
+      assert_equal 2 , SlottedMessage.new([:caller]).slots_length
     end
     def test_for_const
-      slotted = Slotted.for(StringConstant.new("hi") , [])
+      slotted = Slotted.for(StringConstant.new("hi") , nil)
       assert_equal "StringConstant" , slotted.to_s
     end
   end

test/slot_machine/test_slotted_constant.rb

@@ -6,7 +6,7 @@ module SlotMachine
     def setup
       Parfait.boot!(Parfait.default_test_options)
       compiler = Risc::FakeCompiler.new
-      @slotted = Slotted.for(StringConstant.new("hi") , [])
+      @slotted = Slotted.for(StringConstant.new("hi") , nil)
       register = @slotted.to_register(compiler , InstructionMock.new)
       @instruction = compiler.instructions.first
     end

test/slot_machine/test_slotted_message.rb

@@ -3,7 +3,7 @@ require_relative "helper"
 module SlotMachine
   class TestSlottedMessage < MiniTest::Test
 
-    def slotted(slot = :caller)
+    def slotted(slot = [:caller])
       SlottedMessage.new(slot)
     end
     def test_create_ok1

test/slot_machine/test_slotted_message2.rb

@@ -5,7 +5,7 @@ module SlotMachine
     def setup
       Parfait.boot!(Parfait.default_test_options)
       compiler = Risc::FakeCompiler.new
-      slotted = SlottedMessage.new(:caller)
+      slotted = SlottedMessage.new([:caller])
       @register = slotted.to_register(compiler , "fake source")
       @instruction = compiler.instructions.first
     end