anchor.diff:  %%       Config0 = Config1 = [tuple()]
   %% @doc runs cleanup after matching test group is fully executed.
   end_per_group(_GroupName, _Config) ->
  -    ok.
  +  ok.
   
   %% @spec init_per_testcase(TestCase, Config0) ->
   %%         Config1 | {skip, Reason} | {skip_and_save, Reason, Config1}
  
positive.code: %%       Info = [tuple()]
  %% @doc returns list of tuples to set properties for the test case.
  my_test_case() -> 
      [].
  %%--------------------------------------------------------------------
  %% Function: TestCase(Config0) ->
  %%               ok | exit() | {skip,Reason} | {comment,Comment} |
  %%               {save_config,Config1} | {skip_and_save,Reason,Config1}
  %%
  %% Config0 = Config1 = [tuple()]
  %%   A list of key/value pairs, holding the test case configuration.
  %% Reason = term()
  %%   The reason for skipping the test case.
  %% Comment = term()
  %%   A comment about the test case that will be printed in the html log.
  %%
  %% Description: Test case function. (The name of it must be specified in
  %%              the all/0 list or in a test case group for the test case
  %%              to be executed).
  %%--------------------------------------------------------------------
  %% @spec TestCase(Config0) ->
  %%         ok | exit() | {skip, Reason} | {comment, Comment} |
  %%         {save_config, Config} | {skip_and_save, Reason, Config1}
  
negative.code: %%       Reason = term()
  %% @doc runs initialization before matching test group is executed.
  init_per_group(_GroupName, Config) ->
    Config.
  
  %% @spec end_per_group(GroupName, Config0) -> ok | {save_config, Config1}
  %% where
  