The indentation for ' spec' wasn't correct and this wouldn't deploy. The indentation in the book itself is correct. I changed it to a working deployment.
FYI: this was the error I got with the initial deployment:
error: error validating "test-with-space.yaml": error validating data: ValidationError(Pod.metadata): unknown field "spec" in io.k8s.apimachinery.pkg.apis.meta.v1.ObjectMeta; if you choose to ignore these errors, turn validation off with --validate=false
