refactor: fix formatting and ensure consistent style

- Adjusted formatting in Nix files by revising argument lists.
- Added missing commas for consistency.
- Removed extraneous whitespace and ensured uniform newline usage.

modules/home/gui/kbd/default.nix

@@ -15,11 +15,11 @@ in
         key <AB09> { [ period, greater, ellipsis, division ] };
       };
     '';
-    
+
     xdg.configFile."xkb/rules/evdev".text = ''
       ! option = symbols
         mod:ellipsis    = +mod(ellipsis)
       ! include %S/evdev
     '';
   };
-}
+}