anchor.diff:      ["0","0",[N3a,N3b]];
   nest(_) ->
       ["0","0","0"].
  +
  +%%
  +%% Test
  +%%
  +
  +simple_test() ->
  +    application:set_env(riak, riak_fs_backend_root,
  +                        "test/fs-backend"),
  +    ?assertCmd("rm -rf test/fs-backend"),
  +    riak_test_util:standard_backend_test(riak_fs_backend).
  
positive.code: 
  -module(riak_fs_backend).
  -export([start/1,stop/1,get/2,put/3,list/1,list_bucket/2,delete/2]).
  % @type state() = term().
  -record(state, {dir}).
  
  
negative.code:     clean(base64:encode_to_string(atom_to_list(Bucket))).
  
  decode_bucket(B64) ->
      list_to_atom(base64:decode_to_string(dirty(B64))).
  
  encode_key(Key) ->
      clean(base64:encode_to_string(Key)).
  