anchor.diff:  %% OTP_14285: Unicode atoms.
   otp_14285(Config) when is_list(Config) ->
       %% This is just a sample of errors.
  -    Cs = [{otp_8562,
  +    Cs = [{otp_14285,
              <<"-export([f/0]).
                 -define('a\x{400}b', 'a\x{400}d').
                 f() ->
  
positive.code: %% OTP-10302. Unicode characters scanner/parser.
  otp_10302(Config) when is_list(Config) ->
      %% Two messages (one too many). Keeps otp_4871 happy.
      Cs = [{otp_8562,
             <<"%% coding: utf-8\n \n \x{E4}">>,
             {errors,[{{3,1},epp,cannot_parse},
                      {{3,1},file_io_server,invalid_unicode}],[]}}
  
negative.code: 
  %% OTP-8665. Bugfix premature end.
  otp_8665(Config) when is_list(Config) ->
      Cs = [{otp_8665,
             <<"\n-define(A, a)\n">>,
             {errors,[{{2,13},epp,premature_end}],[]}}
           ],
  