931b7b47a2
This fixes some quirks I introduced in previous commits. 1. No need for an extra newline when printing the output of shell commands. 2. 'or die' is what's already used in the NixOS test sources, while 'die unless' has no occurrences.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.