Issue while hidding all usb from dom0

I am trying to hide usb controllers form dom0 and I had followed this doc USB qubes | Qubes OS

Note: I am using external keyboard

inputs :
sudo nano /etc/default/grub

outputs :
GRUB_CMDLINE_LINUX=“rd.luks.uuid=luks-fe66ed55-5286-486b-86e9-87f3b04d7cef plymouth.ignore-serial>.<serial-consoles i915.alpha_support=1 rd.driver.pre=btrfs rhgb quiet” usbcore…authorized_default=0 rd.qubes.hide_all_usb

I have added to the previous line "usbcore.authorized_default=0 rd.qubes.hide_all_usb"

2- sudo grub2-mkconfig -o /boot/grub2/grub.cfg


/etc/default/grub: line 6: usbcore.authorized_default=0: command not found

what is the problem here ?

This part doesn’t look good, it has typos. It should be

plymouth.ignore-serial-consoles i915.alpha_support=1 rd.driver.pre=btrfs rhgb quiet usbcore.authorized_default=0 rd.qubes.hide_all_usb"

Typos are >.< and 2 dots after the word usb (I guess this is copy/pasting issue and not in the grub), but the final quote (") at the wrong place, after the word quiet instead at the end of the line