bug#55622: Bug in sort with keys and reverse, and version-sort and reverse

[Larry Ploetz]

I think I've found a bug in sort (git branch master). The --reverse flag 
seems to be ignored when --keys are supplied.

   larryp-MBP:bin larry$ ./sort --version
   sort (GNU coreutils) 9.1.17-a351f
   Copyright (C) 2022 Free Software Foundation, Inc.
   License GPLv3+: GNU GPL version 3 or 
later<https://gnu.org/licenses/gpl.html>.
   This is free software: you are free to change and redistribute it.
   There is NO WARRANTY, to the extent permitted by law.

   Written by Mike Haertel and Paul Eggert.
   larryp-MBP:bin larry$ ./sort -r <<< $'a\nb'
   b
   a
   larryp-MBP:bin larry$ ./sort -rk1,1 <<< $'a\nb'
   a
   b

This may be related to a bug reported in February where --version-sort 
sorted incorrectly.

   larryp-MBP:bin larry$ ./sort -Vr <<< $'1\n2'
   1
   2
   larryp-MBP:bin larry$ ./sort -V <<< $'1\n2'
   1
   2

Current version:

   larryp-MBP:bin larry$ sort --version
   sort (GNU coreutils) 9.1
   Copyright (C) 2022 Free Software Foundation, Inc.
   License GPLv3+: GNU GPL version 3 or 
later<https://gnu.org/licenses/gpl.html>.
   This is free software: you are free to change and redistribute it.
   There is NO WARRANTY, to the extent permitted by law.

   Written by Mike Haertel and Paul Eggert.
   larryp-MBP:bin larry$ sort -rk1,1 <<< $'a\nb'
   b
   a

Thanks,
· Larry