fix binary code offset when calling

in other words, remember the arm pipeline being 8

lib/arm/instructions/call_instruction.rb

@@ -52,7 +52,7 @@ module Arm
         # But, for methods, this happens to be the size of the object header,
         # so there it balances out, but not blocks
         # have to use the code, not the method object for methods
-        arg = Risc::Position.get(@first) - Risc::Position.get(self) + 4
+        arg = Risc::Position.get(@first) - Risc::Position.get(self)
       else
         arg = @first
       end

test/arm/test_call.rb

@@ -22,7 +22,7 @@ module Arm
       Risc::Position.set(@binary , 0)
       code = @machine.call(	bin ,{} )#this jumps to the next instruction
       Risc::Position.set(code , 0, @binary)
-      assert_code code , :call, [0x09,0x0,0x0,0xeb]
+      assert_code code , :call, [0x08,0x0,0x0,0xeb]
     end
     def test_swi
       code = @machine.swi( 0x05 )

test/elf/test_hello.rb

@@ -12,7 +12,7 @@ class HelloTest < MiniTest::Test
   end
 
   def test_string_put
-    @input = "'Hello'.putstring"
+    @input = "return 'Hello'.putstring"
     check
   end
 end