Format code with alejandra

hosts/pingbox/configuration.nix

@@ -1,16 +1,17 @@
 # Edit this configuration file to define what should be installed on
 # your system.  Help is available in the configuration.nix(5) man page
 # and in the NixOS manual (accessible by running ‘nixos-help’).
-
-{ config, pkgs, ... }:
-
 {
-  imports =
-    [ # Include the results of the hardware scan.
-      ./hardware-configuration.nix
-      ../common
-      ../common/graphical
-    ];
+  config,
+  pkgs,
+  ...
+}: {
+  imports = [
+    # Include the results of the hardware scan.
+    ./hardware-configuration.nix
+    ../common
+    ../common/graphical
+  ];
 
   powerManagement = {
     enable = true;
@@ -55,6 +56,4 @@
   # Before changing this value read the documentation for this option
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
   system.stateVersion = "21.05"; # Did you read the comment?
-
 }
-