juju model-config/controller-config with single key arg outputs YAML

[Andrew Wilkins]

It is expected that "juju controller-config <key>" and "juju model-config <key>" output values in their raw format, rather than as YAML. At the moment, for example, "juju controller-config ca-cert" gives me:

|
  -----BEGIN CERTIFICATE-----
  MIIDrTCCApWgAwIBAgIVAKwx29pLb5uBbI15s2Ix8ZX6xcmWMA0GCSqGSIb3DQEB
  CwUAMG4xDTALBgNVBAoTBGp1anUxLjAsBgNVBAMMJWp1anUtZ2VuZXJhdGVkIENB
  IGZvciBtb2RlbCAianVqdS1jYSIxLTArBgNVBAUTJDI1N2IzMWQ0LWYxYzMtNGVk
  OC04Y2Y5LTg4NjliNTdiM2RlMzAeFw0xNzAxMjcwNjAyNTJaFw0yNzAyMDMwNjAy
  NTJaMG4xDTALBgNVBAoTBGp1anUxLjAsBgNVBAMMJWp1anUtZ2VuZXJhdGVkIENB
  IGZvciBtb2RlbCAianVqdS1jYSIxLTArBgNVBAUTJDI1N2IzMWQ0LWYxYzMtNGVk
  OC04Y2Y5LTg4NjliNTdiM2RlMzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC
  ggEBAK7exrkwH88dFujCuWrvXSZvUKtMyuJjSaS2JBHBSvhCZ+92z0IDkIzYKyqf
  7rVEVuOqTY2aovLRJfQDoruehINBzGts7GtY5OcnioGfQvLlB7HMRq45UbnErBwv
  rA0IwXmU3jbZniChRDjUuoxqjFMOm/wdCN/JmTxpF4InpYvTKeRy/FD3bMtqYPp0
  a4qr+tPVIWhEF9SzrHkuuCw3+ubhKvnlojzkmzQIEaqjT7Ci57EdFmshKMQA5tD/
  cJ+hUT8kd0a6CzbE6dzn+VK0wS5bhiI5bB+oKQnW7ubObhofs2vfKe+V5egFVYkf
  y6HM6NfARg53PMGBPoWVlkEvDz8CAwEAAaNCMEAwDgYDVR0PAQH/BAQDAgKkMA8G
  A1UdEwEB/wQFMAMBAf8wHQYDVR0OBBYEFPI29LgpKo8133KeKBXJmMROVmzPMA0G
  CSqGSIb3DQEBCwUAA4IBAQB60L9c7IXz192/z1PQPgGIg2pmFVu6JCJUuSa0rgdV
  +3JghYhjDKUvwcyeNjAmbjOWrRf05yBMtfqoce8+DG0HLFonB9kBOcrin2FqwkE7
  HeFD3CqDWHwIdkI1YevWssBd97jeNncUoUkXZ95PvbaTuKQWJuXJBGpp9ZqEIO1d
  ckro5Jze0z5f6Lt7aoh+FatOECEz7p6BhEv1VC05N9RPtONqbzpogb40spRLm9ZX
  uD31X+rjN3CbFVaW1u32nUR1MgVKyp+62Klr3lNCZqEkly+geTzT+wQZlTNtk219
  OnpQGM5sVzeiR0VXf7Y9pZMJsUteNsiCbIZ+LIby6pqh
  -----END CERTIFICATE-----

(note leading "|", which is YAML for multi-line string)

[Anastasia (anastasia-macmood)]

PR against 2.1: https://github.com/juju/juju/pull/6928

[Anastasia (anastasia-macmood)]

Supporting PR in juju/cmd: https://github.com/juju/cmd/pull/46

[Anastasia (anastasia-macmood)]

Forward-ported to develop (2.2) as part of a larger merge from 2.1: https://github.com/juju/juju/pull/6934