Множество проблем решается простым форматированием или использованием короткого синтаксиса:

>> config.vm.provision :shell, :inline => "mv /tmp/vagrantfile-user-data /var/lib/coreos-vagrant/", :privileged => true

config.vm.provision :shell,
                    inline: 'mv /tmp/vagrantfile-user-data /var/lib/coreos-vagrant/',
                    privileged: true

>> $shared_folders.each_with_index do |(host_folder, guest_folder), index|
>>
>>config.vm.synced_folder host_folder.to_s, guest_folder.to_s, id: "core-shared" % index, nfs: true, mount_options: ['nolock,vers=3,udp']
>>end

$shared_folders.each_with_index do |(host_folder, guest_folder), index|
        config.vm.synced_folder host_folder.to_s, guest_folder.to_s,
                          id: "core-shared" % index,
                          nfs: true,
                          mount_options: ['nolock,vers=3,udp']
end