add needed package diffutils

Signed-off-by: Kiara Grouwstra <kiara@procolix.eu>

deployment/data-model-test.nix

@@ -98,7 +98,8 @@ in
                     {
                       options.enable = lib.mkEnableOption "Hello in the shell";
                     };
-                  implementation = cfg: {
+                  implementation =
+                    cfg: {
                     resources = lib.optionalAttrs cfg.enable {
                       hello.login-shell.packages.hello = pkgs.hello;
                     };

deployment/flake-part.nix

@@ -38,7 +38,7 @@
         };
 
         deployment-model-tf = import ./check/data-model-tf {
-          inherit (pkgs.testers) runNixOSTest;
+         inherit (pkgs.testers) runNixOSTest;
           inherit inputs sources;
         };
       };