treewide: format all inactive Nix files

After final improvements to the official formatter implementation,
this commit now performs the first treewide reformat of Nix files using it.
This is part of the implementation of RFC 166.

Only "inactive" files are reformatted, meaning only files that
aren't being touched by any PR with activity in the past 2 months.
This is to avoid conflicts for PRs that might soon be merged.
Later we can do a full treewide reformat to get the rest,
which should not cause as many conflicts.

A CI check has already been running for some time to ensure that new and
already-formatted files are formatted, so the files being reformatted here
should also stay formatted.

This commit was automatically created and can be verified using

    nix-build a08b3a4d19.tar.gz \
      --argstr baseRev b32a094368
    result/bin/apply-formatting $NIXPKGS_PATH

nixos/tests/systemd-initrd-btrfs-raid.nix

@@ -1,47 +1,55 @@
-import ./make-test-python.nix ({ lib, pkgs, ... }: {
-  name = "systemd-initrd-btrfs-raid";
+import ./make-test-python.nix (
+  { lib, pkgs, ... }:
+  {
+    name = "systemd-initrd-btrfs-raid";
 
-  nodes.machine = { pkgs, ... }: {
-    # Use systemd-boot
-    virtualisation = {
-      emptyDiskImages = [ 512 512 ];
-      useBootLoader = true;
-      # Booting off the BTRFS RAID requires an available init script from the Nix store
-      mountHostNixStore = true;
-      useEFIBoot = true;
-    };
-    boot.loader.systemd-boot.enable = true;
-    boot.loader.efi.canTouchEfiVariables = true;
+    nodes.machine =
+      { pkgs, ... }:
+      {
+        # Use systemd-boot
+        virtualisation = {
+          emptyDiskImages = [
+            512
+            512
+          ];
+          useBootLoader = true;
+          # Booting off the BTRFS RAID requires an available init script from the Nix store
+          mountHostNixStore = true;
+          useEFIBoot = true;
+        };
+        boot.loader.systemd-boot.enable = true;
+        boot.loader.efi.canTouchEfiVariables = true;
 
-    environment.systemPackages = with pkgs; [ btrfs-progs ];
-    boot.initrd.systemd = {
-      enable = true;
-      emergencyAccess = true;
-    };
+        environment.systemPackages = with pkgs; [ btrfs-progs ];
+        boot.initrd.systemd = {
+          enable = true;
+          emergencyAccess = true;
+        };
 
-    specialisation.boot-btrfs-raid.configuration = {
-      fileSystems = lib.mkVMOverride {
-        "/".fsType = lib.mkForce "btrfs";
+        specialisation.boot-btrfs-raid.configuration = {
+          fileSystems = lib.mkVMOverride {
+            "/".fsType = lib.mkForce "btrfs";
+          };
+          virtualisation.rootDevice = "/dev/vdb";
+        };
       };
-      virtualisation.rootDevice = "/dev/vdb";
-    };
-  };
 
-  testScript = ''
-    # Create RAID
-    machine.succeed("mkfs.btrfs -d raid0 /dev/vdb /dev/vdc")
-    machine.succeed("mkdir -p /mnt && mount /dev/vdb /mnt && echo hello > /mnt/test && umount /mnt")
+    testScript = ''
+      # Create RAID
+      machine.succeed("mkfs.btrfs -d raid0 /dev/vdb /dev/vdc")
+      machine.succeed("mkdir -p /mnt && mount /dev/vdb /mnt && echo hello > /mnt/test && umount /mnt")
 
-    # Boot from the RAID
-    machine.succeed("bootctl set-default nixos-generation-1-specialisation-boot-btrfs-raid.conf")
-    machine.succeed("sync")
-    machine.crash()
-    machine.wait_for_unit("multi-user.target")
+      # Boot from the RAID
+      machine.succeed("bootctl set-default nixos-generation-1-specialisation-boot-btrfs-raid.conf")
+      machine.succeed("sync")
+      machine.crash()
+      machine.wait_for_unit("multi-user.target")
 
-    # Ensure we have successfully booted from the RAID
-    assert "(initrd)" in machine.succeed("systemd-analyze")  # booted with systemd in stage 1
-    assert "/dev/vdb on / type btrfs" in machine.succeed("mount")
-    assert "hello" in machine.succeed("cat /test")
-    assert "Total devices 2" in machine.succeed("btrfs filesystem show")
-  '';
-})
+      # Ensure we have successfully booted from the RAID
+      assert "(initrd)" in machine.succeed("systemd-analyze")  # booted with systemd in stage 1
+      assert "/dev/vdb on / type btrfs" in machine.succeed("mount")
+      assert "hello" in machine.succeed("cat /test")
+      assert "Total devices 2" in machine.succeed("btrfs filesystem show")
+    '';
+  }
+)