anchor.diff:  %% copies of the Software, and to permit persons to whom the
   %% Software is furnished to do so, subject to the following
   %% conditions:
  -%% 
  +%%
   %% The above copyright notice and this permission notice shall be
   %% included in all copies or substantial portions of the Software.
  -%% 
  +%%
   %% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   %% EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
   %% OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  
positive.code: %% Copyright (c) 2010 Jacob Vorreuter <jacob.vorreuter@gmail.com>
  %% 
  %% Permission is hereby granted, free of charge, to any person
  %% obtaining a copy of this software and associated documentation
  %% files (the "Software"), to deal in the Software without
  
negative.code:         1 -> ok;
          Err -> Err
      end.
  
  %%====================================================================
  %% GRID
  %%====================================================================
  