modules/fn: add augroup to the content option

modules/fn.nix

@@ -1,4 +1,4 @@
-{ lib, ... }:
+{ lib, pkgs, ... }:
 
 let
   inherit (lib.nix2lua) lambda raw;
@@ -19,7 +19,11 @@ let
               };
             }
             ./vim/keymap.nix
+            ./vim/augroup.nix
             # ./vim/opts.nix
+
+            ##################################################
+            (pkgs.path + "/nixos/modules/misc/assertions.nix")
           ];
           specialArgs = { inherit lib; };
         });