example fix

modules/testing/driver/kubetest.nix

@@ -1,17 +1,23 @@
-{ lib, config, pkgs, ... }:
-
-with lib;
-let
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+with lib; let
   testing = config.testing;
   cfg = testing.driver.kubetest;
 
-  kubetest = import ./kubetestdrv.nix { inherit pkgs; };
+  kubetest = import ./kubetestdrv.nix {inherit pkgs;};
 
-  pythonEnv = pkgs.python38.withPackages (ps: with ps; [
-    pytest
-    kubetest
-    kubernetes
-  ] ++ cfg.extraPackages);
+  pythonEnv = pkgs.python38.withPackages (ps:
+    with ps;
+      [
+        pytest
+        kubetest
+        kubernetes
+      ]
+      ++ cfg.extraPackages);
 
   toTestScript = t:
     if isString t.script
@@ -23,33 +29,34 @@ let
     else t.script;
 
   tests = let
-   # make sure tests are prefixed so that alphanumerical
-   # sorting reproduces them in the same order as they
-   # have been declared in the list.
-   seive = t: t.script != null && t.enabled;
-   allEligibleTests = filter seive testing.tests;
-   listLengthPadding = builtins.length (
-     lib.stringToCharacters (
-       builtins.toString (
-         builtins.length allEligibleTests)));
-   op =
-     (i: t: {
-       path = toTestScript t;
-       name = let
-         prefix = lib.fixedWidthNumber listLengthPadding i;
-       in "${prefix}_${t.name}_test.py";
-     });
-  in pkgs.linkFarm "${testing.name}-tests" (
-    lib.imap0 op allEligibleTests
-  );
+    # make sure tests are prefixed so that alphanumerical
+    # sorting reproduces them in the same order as they
+    # have been declared in the list.
+    seive = t: t.script != null && t.enabled;
+    allEligibleTests = filter seive testing.tests;
+    listLengthPadding = builtins.length (
+      lib.stringToCharacters (
+        builtins.toString (
+          builtins.length allEligibleTests
+        )
+      )
+    );
+    op = i: t: {
+      path = toTestScript t;
+      name = let
+        prefix = lib.fixedWidthNumber listLengthPadding i;
+      in "${prefix}_${t.name}_test.py";
+    };
+  in
+    pkgs.linkFarm "${testing.name}-tests" (
+      lib.imap0 op allEligibleTests
+    );
 
   testScript = pkgs.writeScript "test-${testing.name}.sh" ''
     #!/usr/bin/env bash
     ${pythonEnv}/bin/pytest -p no:cacheprovider ${tests} $@
   '';
-
-in
-{
+in {
   options.testing.driver.kubetest = {
     defaultHeader = mkOption {
       type = types.lines;
@@ -62,7 +69,7 @@ in
     extraPackages = mkOption {
       type = types.listOf types.package;
       description = "Extra packages to pass to tests";
-      default = [ ];
+      default = [];
     };
   };