bug#44155: Print integers as characters

[Juri Linkov]

>> >>   if (EQ (Vinteger_output_format, Qt) && CHARACTERP (obj)
>> >> -     && (c = XFIXNUM (obj)))
>> >> +     && (c = XFIXNUM (obj)) && ! CHAR_BYTE8_P (c))
>> >
>> > If a test fails, it is better to fix the test and not make the code
>> > less powerful, don't you agree?
>> 
>> This means sweeping the problems under the carpet.
>
> Which problem?

Problem of ambiguous numbers 128 and 4194176 that are both printed as ?\200.

>> >   (decode-char 'eight-bit ?\200)
>> >
>> > Can't this be used in the test?
>> 
>> Using this code in tests means that the users should use the same code
>> in their programs.
>
> Why would they need to do that?  The test needs it because it wants to
> verify the result, but "normal" programs don't need to read back the
> values they printed.

Programs print the lists of characters, and other programs read them.

>> Thus 'print' should print '(33 4194176) as such ugly code:
>> `(?! ,(decode-char 'eight-bit ?\200))
>
> I don't see why.  ?\200 and 4194176 are two forms of the same
> character.

?\200 and 128 are two forms of the same character too.