don't try to manage /dev/pts, it's covered by /dev?

In any case, unmounting this was giving me trouble this time.

howto/new-machine-cymru.md

@@ -228,7 +228,7 @@ working shell in the `chroot`:
     cryptsetup luksOpen /dev/sda3 crypt_sda3 &&
     vgchange -a y &&
     mount /dev/mapper/vg_ganeti-root /mnt &&
-    for fs in /run /sys /dev /dev/pts /proc; do mount -o bind $fs /mnt$fs; done &&
+    for fs in /run /sys /dev /proc; do mount -o bind $fs /mnt$fs; done &&
     mount /dev/sda2 /mnt/boot &&
     chroot /mnt /bin/bash
 
@@ -240,7 +240,7 @@ This will rebuild grub:
 And this will cleanup the rest:
 
     umount /mnt/boot &&
-    for fs in /dev/pts /dev /sys /run /proc; do umount /mnt$fs; done &&
+    for fs in /dev /sys /run /proc; do umount /mnt$fs; done &&
     umount /mnt &&
     vgchange -a n &&
     cryptsetup luksClose crypt_sda3