anchor.diff:      %% all is always valid
       case validate_permissions(Revokes) of
           ok ->
  -            case add_revoke_int([all], Bucket, revokes) of
  +            case add_revoke_int([{all, group}], Bucket, Revokes) of
                   ok ->
                       ok;
                   Error2 ->
  
positive.code:             ok
      end.
  
  del_group(Groupname) ->
      case group_exists(Groupname) of
          false ->
  
negative.code:     %% all is always valid
      case validate_permissions(Grants) of
          ok ->
              add_grant_int([{all, group}], Bucket, Grants);
          Error ->
              Error
      end;
  