Update ui_test.go
Update ui_test.go

fix typo and tty usage

paulmey/packer,timsutton/packer,rnaveiras/packer,tas50/packer,mitchellh/packer,timsutton/packer,mitchellh/packer,mitchellh/packer,grubernaut/packer,tas50/packer,hashicorp/packer,dave2/packer,paulmey/packer,hashicorp/packer,grubernaut/packer,mitchellh/packer,dave2/packer,dave2/packer,rnaveiras/packer,bryson/packer,bryson/packer,timsutton/packer,ricardclau/packer,rnaveiras/packer,bryson/packer,ricardclau/packer,tas50/packer,hashicorp/packer,grubernaut/packer,dave2/packer,paulmey/packer,pecigonzalo/packer,timsutton/packer,pecigonzalo/packer,rnaveiras/packer,rnaveiras/packer,rnaveiras/packer,mitchellh/packer,ricardclau/packer,grubernaut/packer,ricardclau/packer,hashicorp/packer,pecigonzalo/packer,dave2/packer,timsutton/packer,grubernaut/packer,grubernaut/packer,tas50/packer,timsutton/packer,ricardclau/packer,bryson/packer,bryson/packer,bryson/packer,pecigonzalo/packer,ricardclau/packer,tas50/packer,paulmey/packer,tas50/packer,dave2/packer,paulmey/packer,paulmey/packer