Make cabal's cabal file compliant with cabal v3

[jappeace]

The dot newline is no longer supported since v3.
User is supposed to cleanup.
Addresses for cabal at least #11518

• Patches conform to the coding conventions.
• Any changes that could be relevant to users have been recorded in the changelog.
  • Is the change significant? If so, remember to add significance: significant in the changelog file.
• The documentation has been updated, if necessary.
• Manual QA notes have been included.
• Tests have been added. (Ask for help if you don’t know how to write them! Ask for an exemption if tests are too complex for too little coverage!)

[geekosaur]

Are we ok to merge, @jappeace?

[jappeace]

yeah, I was just wondering how to do that

[geekosaur]

Done. Barring complaints during the cooldown period, it'll go in in 2 days.

[mergify]

Merge Queue Status

Rule: default

---

• ✅ Entered queue — 2026-02-28 12:31 UTC
• ✅ Checks passed · on draft merge queue: embarking master (94f5f44) and #11524 together #11539
• ✅ Merged — 2026-02-28 14:28 UTC · at 176b171e62fdf1f5325b2f21568b603a11b51b55

This pull request spent 1 hour 57 minutes 6 seconds in the queue, including 1 hour 46 minutes 23 seconds running CI.

Required conditions to merge

• #approved-reviews-by >= 2 [🛡 GitHub branch protection]
  • Make cabal's cabal file compliant with cabal v3 #11524
• #changes-requested-reviews-by = 0 [🛡 GitHub branch protection]
  • Make cabal's cabal file compliant with cabal v3 #11524
• #review-threads-unresolved = 0 [🛡 GitHub branch protection]
  • Make cabal's cabal file compliant with cabal v3 #11524
• any of [🛡 GitHub branch protection]:
  • check-success = Doctest Cabal
  • check-neutral = Doctest Cabal
  • check-skipped = Doctest Cabal
• any of [🛡 GitHub branch protection]:
  • check-success = Meta checks
  • check-neutral = Meta checks
  • check-skipped = Meta checks
• any of [🛡 GitHub branch protection]:
  • check-success = docs/readthedocs.org:cabal
  • check-neutral = docs/readthedocs.org:cabal
  • check-skipped = docs/readthedocs.org:cabal
• any of [🛡 GitHub branch protection]:
  • check-success = Validate post job
  • check-neutral = Validate post job
  • check-skipped = Validate post job
• any of [🛡 GitHub branch protection]:
  • check-success = fourmolu
  • check-neutral = fourmolu
  • check-skipped = fourmolu
• any of [🛡 GitHub branch protection]:
  • check-success = hlint
  • check-neutral = hlint
  • check-skipped = hlint
• any of [🛡 GitHub branch protection]:
  • check-success = Bootstrap post job
  • check-neutral = Bootstrap post job
  • check-skipped = Bootstrap post job
• any of [🛡 GitHub branch protection]:
  • check-success = whitespace
  • check-neutral = whitespace
  • check-skipped = whitespace
• any of [🛡 GitHub branch protection]:
  • check-success = Check sdist post job
  • check-neutral = Check sdist post job
  • check-skipped = Check sdist post job
• any of [🛡 GitHub branch protection]:
  • check-success = Changelogs
  • check-neutral = Changelogs
  • check-skipped = Changelogs