[SOLVED] sudo broken

I have broken sudo. I can't see a path to fixing it.

I have a domain joined machine ruing 16.04 64 bit Ubuntu. I was attempting to add a user and a couple of domain groups to the sudoers list by adding a file under /etc/sudoers.d/. I was able to do just that, but apparently sudo does not like my syntax.

sudo ls
>>> /etc/sudoers.d/DomainAdminRights: syntax error near line 3 <<<
sudo: parse error in  near line 3
sudo: no valid sudoers sources found, quitting
sudo: unable to initialize policy plugin

cat /etc/sudoers.d/DomainAdminRights 
# Added 20160513 for domain level admin rights
particularuseame ALL=(ALL:ALL) ALL
%"Domain Admins" ALL=(ALL:ALL) ALL
%spacelessgroupname ALL=(ALL:ALL) ALL

No one can sudo, so I can't remove the file. The disk is encrypted, so I can't just mount it with something else.

A little help?