blog: nixos-pinephone: fix syntax highlighting

content/blog/2022-05-20-mobile-nixos-pinephone.md

@@ -80,7 +80,7 @@ we'll want to rebuild the image and include a user, desktop environment, and som
 
 we'll use home-manager to make user setup a bit nicer. add that to `flake.nix`:
 
-```diff -u a/flake.nix b/flake.nix
+```diff
  inputs = {
    nixpkgs.url = "nixpkgs/dfd82985c273aac6eced03625f454b334daae2e8";
    mobile-nixos = {
@@ -92,7 +92,7 @@ we'll use home-manager to make user setup a bit nicer. add that to `flake.nix`:
 ```
 
 add a module for this pinephone build:
-```diff -u a/flake.nix b/flake.nix
+```diff
 -  outputs = { self, nixpkgs, mobile-nixos }: {
 +  outputs = { self, nixpkgs, mobile-nixos, home-manager }: {
      pinephone-img = (pkgs-mobile.lib.nixosSystem {
@@ -182,7 +182,7 @@ and then populate `modules/default.nix`. you could just throw everything in here
 ```
 
 `modules/phosh.nix`:
-```
+```nix
 { ... }:
 {
   services.xserver.desktopManager.phosh = {
@@ -244,7 +244,7 @@ eject the card and boot the phone, login, and toy around with it. open the displ
 ## Building Generations on the Device
 we don't want to re-flash the device _every_ time we change something. let's update the flake to allow on-device updates.
 
-```diff -u a/flake.nix b/flake.nix
+```diff
 - outputs = { self, nixpkgs, mobile-nixos, home-manager }: {
 -   pinephone-img = (nixpkgs.lib.nixosSystem {
 + outputs = { self, nixpkgs, mobile-nixos, home-manager }: rec {