diffutils: 3.8 -> 3.9

[trofi]

Changes: https://savannah.gnu.org/forum/forum.php?forum_id=10282

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[trofi]

Breaks at least groff tests:

groff> FAIL: contrib/gdiffmk/tests/gdiffmk_tests.sh
groff> ============================================
groff> result.1 TEST FAILED
groff> 5c5
groff> < .mc |
groff> ---
groff> > file1 only
groff> 8d7
groff> < .mc
groff> 10d8
groff> < .mc +

Filed upstream report: https://savannah.gnu.org/bugs/index.php?63726

Switching to draft for now.

[trofi]

diffutils regression https://git.savannah.gnu.org/cgit/groff.git/commit/?id=10274fb69e517b2c4b10fcd0ba3347e5bd0eefd7. Will try to backport today.

[trofi]

Can build groff now. Ready for review.