Format with nixfmt

Change-Id: If9839d2c3308538ac8f3e166b69675d3b40bd7d9
diff --git a/modules/kitty.nix b/modules/kitty.nix
index 4d4b730..b85b35a 100644
--- a/modules/kitty.nix
+++ b/modules/kitty.nix
@@ -1,3 +1 @@
-{ pkgs, ... }: {
-  environment.systemPackages = [ pkgs.kitty ];
-}
+{ pkgs, ... }: { environment.systemPackages = [ pkgs.kitty ]; }