disko: README fixup

disko/README.md

@@ -1,8 +1,10 @@
-##Step by step##
+## Step by step
 1. Boot the [installer](https://nixos.org/download.html#nixos-iso)
 
 2. Get disk name 
-```$ lsblk```
+```
+$ lsblk
+```
 
 3. Get disko config
 ```
@@ -17,11 +19,19 @@ $ sudo nix --experimental-features "nix-command flakes" run github:nix-community
 ```
 
 6. Check if it got mounted
-```$ mount | grep /mnt```
+```
+$ mount | grep /mnt
+```
 
 7. Continue with NixOS installation
 Filesystem definitions come from disko, hence "--no-filesystems"
-`Alternative:` continue with normal hardware-config
 ```
 $ nixos-generate-config --no-filesystems --root /mnt
 $ mv /tmp/disko-config.nix /mnt/etc/nixos
+```
+
+`Alternative:` continue with normal hardware-config
+```
+$ nixos-generate-config --root /mnt
+```
+