anchor.diff:      io:format("test: sec_to_date/1 - 1~n"),
       "2005-01-31 14:06:07" = sec_to_date(1107176767),
   
  +    io:format("test: sec_to_date/1 - 2~n"),
  +    "never" = sec_to_date(never),
   
       %% test isnumeric(Number)
       %%--------------------------------------------------------------------
  
positive.code: %%--------------------------------------------------------------------
  
  -module(util).
  
  %%--------------------------------------------------------------------
  %% External exports
  
negative.code:     case digit(C) of
  	error ->
  	    %% Backslash not followed by digit, not a group.
  	    %% XXX shouldn't we preserve the backslash as well as C?
  	    [C | apply_rewrite(Rest, List)];
  	0 ->
  	    %% Backslash followed by the digit zero, not a group.
  	    %% XXX shouldn't we preserve the backslash as well as C?
  	    [C | apply_rewrite(Rest, List)];
  	Number ->
  	    %% Backslash followed by a digit between 1 and 9.
  