anchor.diff:  
   foo22() ->
       42.
  +
  +%% Normal, 3 proc: Simple send-receive.
  +-spec test3() -> 'ok'.
   
   test3() ->
       Self = self(),
  
positive.code: foo32(Pid) ->
      Pid ! msg2.
  
  -spec test4() -> no_return().
  
  test4() ->
  
negative.code: foo1(Pid) ->
      Pid ! 42.
  
  %% Normal, 3 proc: Only spawns.
  -spec test2() -> 'ok'.
  
  test2() ->
  