Re: Bison 3.5.93 on AIX 7.1

Hi Akim,

> The problem appears to be that "diff -u" is not formatted as expected,
> as shows this diff of "diff -u":
> 
> 2,9c2,9
> <    156         | . '$' non_post_simp_exp
> < 
> <      NAME  shift, and go to state 9
> < -    '$'   shift, and go to state 24
> < +    '$'   shift, and go to state 320
> < 
> <      NAME      [reduce using rule 152 (opt_variable)]
> <      '$'       [reduce using rule 152 (opt_variable)]
> ---
> >     156         | . '$' non_post_simp_exp
> >   
> >       NAME  shift, and go to state 9
> > -     '$'   shift, and go to state 24
> > +     '$'   shift, and go to state 320
> >   
> >       NAME      [reduce using rule 152 (opt_variable)]
> >       '$'       [reduce using rule 152 (opt_variable)]
> 
> This should address this problem.

Indeed, 'diff -u' on this platform inserts an extra space between the first and
the second column. Which is not compliant to POSIX
<https://pubs.opengroup.org/onlinepubs/9699919799/utilities/diff.html>.

Bruno