nixos-rebuild-ng: Fix a typo and a few unbalanced curly quotes in the man page (#423046)

	trusted user in the Nix daemon. This can be achieved by using the

	_nix.settings.trusted-users_ NixOS option. Examples values for that

	option are described in the “Remote builds” chapter in the Nix manual,

	(i.e. ‘--builders "ssh://bigbrother x86_64-linux"‘). By specifying an

	(i.e. ‘--builders "ssh://bigbrother x86_64-linux"’). By specifying an

	empty string existing builders specified in /etc/nix/machines can be

	ignored: ‘--builders ""‘ for example when they are not reachable due to

	ignored: ‘--builders ""’ for example when they are not reachable due to

	network connectivity.

*--profile-name* _name_, *-p* _name_

	track of the current and previous system configurations, use

	_/nix/var/nix/profiles/system-profiles/name_. When you use GRUB 2, for

	every system profile created with this flag, NixOS will create a submenu

	named “NixOS - Profile _name_“ in GRUB's boot menu, containing the

	named “NixOS - Profile _name_” in GRUB's boot menu, containing the

	current and previous configurations of this profile.

	For instance, if you want to test a configuration file named _test.nix_

		$ nixos-rebuild switch -p test -I nixos-config=./test.nix

	The new configuration will appear in the GRUB 2 submenu “NixOS - Profile

	‘test’“.

	‘test’”.

*--specialisation* _name_, *-c* _name_

	Activates given specialisation; when not specified, switching and testing

*--verbose,*  *-v*,  *--quiet*,  *--log-format*,  *--no-build-output*, *-Q*,

*--max-jobs*, *-j*, *--cores*, *--keep-going*, *-k*, *--keep-failed*, *-K*,

*--fallback*, *--incllude*, *-I*, *--option*, *--repair*, *--builders*,

*--fallback*, *--include*, *-I*, *--option*, *--repair*, *--builders*,

*--print-build-logs*, *-L*, *--show-trace*

See the Nix manual, *nix flake lock --help* or *nix-build --help* for details.