Format all Nix files using the officially approved formatter,
making the CI check introduced in the previous commit succeed:
nix-build ci -A fmt.check
This is the next step of the of the [implementation](https://github.com/NixOS/nixfmt/issues/153)
of the accepted [RFC 166](https://github.com/NixOS/rfcs/pull/166).
This commit will lead to merge conflicts for a number of PRs,
up to an estimated ~1100 (~33%) among the PRs with activity in the past 2
months, but that should be lower than what it would be without the previous
[partial treewide format](https://github.com/NixOS/nixpkgs/pull/322537).
Merge conflicts caused by this commit can now automatically be resolved while rebasing using the
[auto-rebase script](8616af08d9/maintainers/scripts/auto-rebase).
If you run into any problems regarding any of this, please reach out to the
[formatting team](https://nixos.org/community/teams/formatting/) by
pinging @NixOS/nix-formatting.
https://git.sr.ht/~c00w/nixpkgs/tree/sdimagebtrfs/item/nixos/lib/make-btrfs-fs.nix
I made only one change which was to use `btrfs check` instead of
`fsck.btrfs` because of this warning
```
btrfs-fs.img> ++ fsck.btrfs /nix/store/6d46rc768c140asy6rjpc5rk568r36zq-btrfs-fs.img
btrfs-fs.img> If you wish to check the consistency of a BTRFS filesystem or
btrfs-fs.img> repair a damaged filesystem, see btrfs(8) subcommand 'check'.
```
Co-authored-by: Colin L Rice <colin@daedrum.net>
