treewide: reformat with nixfmt-rfc-style

tests/multiple.nix

@@ -6,16 +6,23 @@
 }:
 
 let
-    hashPassword = password: pkgs.runCommand
-      "password-${password}-hashed"
-      { buildInputs = [ pkgs.mkpasswd ]; inherit password; }
+  hashPassword =
+    password:
+    pkgs.runCommand "password-${password}-hashed"
+      {
+        buildInputs = [ pkgs.mkpasswd ];
+        inherit password;
+      }
       ''
         mkpasswd -sm bcrypt <<<"$password" > $out
       '';
 
-    password = pkgs.writeText "password" "password";
+  password = pkgs.writeText "password" "password";
 
-    domainGenerator = domain: { pkgs, ... }: {
+  domainGenerator =
+    domain:
+    { pkgs, ... }:
+    {
       imports = [
         ../default.nix
         ./lib/config.nix
@@ -37,7 +44,10 @@ let
       };
       services.dnsmasq = {
         enable = true;
-        settings.mx-host = [ "domain1.com,domain1,10" "domain2.com,domain2,10" ];
+        settings.mx-host = [
+          "domain1.com,domain1,10"
+          "domain2.com,domain2,10"
+        ];
       };
     };
 
@@ -47,23 +57,34 @@ in
   name = "multiple";
 
   nodes = {
-    domain1 = {...}: {
-      imports = [
-        ../default.nix
-        (domainGenerator "domain1.com")
-      ];
-      mailserver.forwards = {
-        "non-local@domain1.com" = ["user@domain2.com" "user@domain1.com"];
-        "non@domain1.com" = ["user@domain2.com" "user@domain1.com"];
+    domain1 =
+      { ... }:
+      {
+        imports = [
+          ../default.nix
+          (domainGenerator "domain1.com")
+        ];
+        mailserver.forwards = {
+          "non-local@domain1.com" = [
+            "user@domain2.com"
+            "user@domain1.com"
+          ];
+          "non@domain1.com" = [
+            "user@domain2.com"
+            "user@domain1.com"
+          ];
+        };
       };
-    };
     domain2 = domainGenerator "domain2.com";
-    client = { pkgs, ... }: {
-      environment.systemPackages = [
-        (pkgs.writeScriptBin "mail-check" ''
-          ${pkgs.python3}/bin/python ${../scripts/mail-check.py} $@
-        '')];
-    };
+    client =
+      { pkgs, ... }:
+      {
+        environment.systemPackages = [
+          (pkgs.writeScriptBin "mail-check" ''
+            ${pkgs.python3}/bin/python ${../scripts/mail-check.py} $@
+          '')
+        ];
+      };
   };
   testScript = ''
     start_all()