anchor.diff:                                  parse_transform ->
                                       [[F | A], B, C];
                                   behaviour ->
  +                                    [A, [F | B], C];
  +                                callback ->
                                       [A, [F | B], C];
                                   _ ->
                                       [A, B, [F | C]]
  
positive.code:                      {attribute, {tree, atom, _, export},
                        [{tree, list, _, {list, List, none}}]}}, Acc) ->
                          lists:foldl(F2, Acc, List);
                     (_, Acc) ->
                          Acc
                  end,
  
negative.code:     file:del_dir(Dir).
  
  -spec compile_priority(File::file:filename()) -> 'normal' | 'behaviour' |
                                                   'callback' |
                                                   'parse_transform'.
  compile_priority(File) ->
      case epp_dodger:parse_file(File) of
  