Separate names with a comma.
FYI I managed to create a support ticket with Parallels, so hopefully somebody will look into this and fix it.
To add more info, I'm on macOS 10.13.6, using Parallels Desktop Pro 14.0.1 (45154). I tried with parallels/debian-8.6 and generic/debian9 Vagrant...
I'm affected by this too (I use a macOS host to run a Debian VM (via Vagrant) for development). The weird part is that using cat or less, I see...