nixos/modules: remove trailing whitespace

This leads to ci failure otherwise if the file gets changed.
git-blame can ignore whitespace changes.

nixos/modules/system/boot/initrd-openvpn.nix

@@ -5,7 +5,7 @@ with lib;
 let
 
   cfg = config.boot.initrd.network.openvpn;
-  
+
 in
 
 {
@@ -16,17 +16,17 @@ in
       type = types.bool;
       default = false;
       description = ''
-        Starts an OpenVPN client during initrd boot. It can be used to e.g. 
-        remotely accessing the SSH service controlled by 
-        <option>boot.initrd.network.ssh</option> or other network services 
+        Starts an OpenVPN client during initrd boot. It can be used to e.g.
+        remotely accessing the SSH service controlled by
+        <option>boot.initrd.network.ssh</option> or other network services
         included. Service is killed when stage-1 boot is finished.
       '';
     };
-    
+
     boot.initrd.network.openvpn.configuration = mkOption {
       type = types.path; # Same type as boot.initrd.secrets
       description = ''
-        The configuration file for OpenVPN. 
+        The configuration file for OpenVPN.
 
         <warning>
           <para>
@@ -47,7 +47,7 @@ in
         message = "You should specify a configuration for initrd OpenVPN";
       }
     ];
-    
+
     # Add kernel modules needed for OpenVPN
     boot.initrd.kernelModules = [ "tun" "tap" ];
 
@@ -60,11 +60,11 @@ in
       cp -pv ${pkgs.glibc}/lib/libresolv.so.2 $out/lib
       cp -pv ${pkgs.glibc}/lib/libnss_dns.so.2 $out/lib
     '';
-    
+
     boot.initrd.secrets = {
       "/etc/initrd.ovpn" = cfg.configuration;
     };
-    
+
     # openvpn --version would exit with 1 instead of 0
     boot.initrd.extraUtilsCommandsTest = ''
       $out/bin/openvpn --show-gateway

nixos/modules/system/boot/loader/systemd-boot/systemd-boot.nix

@@ -64,10 +64,10 @@ in {
       example = 120;
       type = types.nullOr types.int;
       description = ''
-        Maximum number of latest generations in the boot menu. 
+        Maximum number of latest generations in the boot menu.
         Useful to prevent boot partition running out of disk space.
 
-        <literal>null</literal> means no limit i.e. all generations 
+        <literal>null</literal> means no limit i.e. all generations
         that were not garbage collected yet.
       '';
     };

nixos/modules/system/boot/systemd-nspawn.nix

@@ -113,9 +113,9 @@ in {
   config =
     let
       units = mapAttrs' (n: v: let nspawnFile = "${n}.nspawn"; in nameValuePair nspawnFile (instanceToUnit nspawnFile v)) cfg;
-    in 
+    in
       mkMerge [
-        (mkIf (cfg != {}) { 
+        (mkIf (cfg != {}) {
           environment.etc."systemd/nspawn".source = mkIf (cfg != {}) (generateUnits' false "nspawn" units [] []);
         })
         {
@@ -123,7 +123,7 @@ in {
 
           # Workaround for https://github.com/NixOS/nixpkgs/pull/67232#issuecomment-531315437 and https://github.com/systemd/systemd/issues/13622
           # Once systemd fixes this upstream, we can re-enable -U
-          systemd.services."systemd-nspawn@".serviceConfig.ExecStart = [ 
+          systemd.services."systemd-nspawn@".serviceConfig.ExecStart = [
             ""  # deliberately empty. signals systemd to override the ExecStart
             # Only difference between upstream is that we do not pass the -U flag
             "${config.systemd.package}/bin/systemd-nspawn --quiet --keep-unit --boot --link-journal=try-guest --network-veth --settings=override --machine=%i"