anchor.diff:  
   -export([
       ensure_dir/1,
  -    os_filename/1
  +    os_filename/1,
  +    os_escape/1
       ]).
   
   %% @doc Ensure the directory of a file is present. This will still work
  
positive.code: os_filename_bs([C|Rest], Acc) ->
      os_filename(Rest, [C,$\\|Acc]).
  
  
negative.code: %% @author Marc Worrell <marc@worrell.nl>
  %% @copyright 2017-2021 Marc Worrell
  %%
  %% @doc Extra file functions.
  
  %% Copyright 2017-2021 Marc Worrell
  %%
  %% Licensed under the Apache License, Version 2.0 (the "License");
  %% you may not use this file except in compliance with the License.
  