anchor.diff:      lib:format_exception(1, Error, Reason, Stacktrace,
           fun(_M, _F, _A) -> false end,
           fun(T, I) ->
  -            {ok, Cols} = io:columns(),
  -            io_lib_pretty:print(T, I, Cols, -1)
  +            io_lib_pretty:print(T, I, columns(), -1)
           end
       ).
   
  
positive.code: 
  get(Key, Proplist)          -> proplists:get_value(Key, Proplist).
  get(Key, Proplist, Default) -> proplists:get_value(Key, Proplist, Default).
  
negative.code:     re:split(Flat, TermSplit, [trim]).
  
  format_term(Term, Indent, Outer) ->
      io_lib_pretty:print(Term, Indent, columns() - Outer, -1).
  
  format_diff([]) ->
      [];
  