anchor.diff:  %%       Comment = term()
   %% @doc the test function.
   my_test_case(_Config) -> 
  -    ok.
  +  ok.
   
  
positive.code: %% @doc runs initialization before matching test case. Should not alter or 
  %%      remove any key/value pairs to the Config, but may add to it.
  init_per_testcase(_TestCase, Config) ->
      Config.
  
  %% @spec end_per_testcase(TestCase, Config0) ->
  %%         ok | {save_config, Config1} | {fail, Reason}
  
negative.code: %% @doc runs initialization before matching test suite is executed. 
  %%      This function may add key/value pairs to Config.
  init_per_suite(Config) ->
    Config.
  
  %% @spec end_per_suite(Config0) -> ok | {save_config, Config1}
  %% where
  %%       Config0 = Config1 = [tuple()]
  %% @doc runs cleanup after matching test suite is executed.
  end_per_suite(_Config) ->
    ok.
  
  %% @spec init_per_group(GroupName, Config0) -> 
  %%         Config1 | {skip, Reason} | {skip_and_save, Reason, Config1}
  