CLI catalog command - '\n' character in JSON format output

There are newline characters in JSON format output.

For example:

(openstack) catalog show ironic -f json
{
  "endpoints": "regionOne\n public: https://10.9.95.41:13385\nregionOne\n internal: http://192.168.24.3:6385\nregionOne\n admin: http://192.168.24.3:6385\n",
  "type": "baremetal",
  "id": "963ac717f6d24e67946b6cae5cdfba65",
  "name": "ironic"
}

(openstack) catalog show swift -f json
{
  "endpoints": "regionOne\n public: https://10.9.95.41:13808/v1/AUTH_c452477e871c4913affc606044919f67\nregionOne\n admin: http://192.168.24.3:8080\nregionOne\n internal: http://192.168.24.3:8080/v1/AUTH_c452477e871c4913affc606044919f67\n",
  "type": "object-store",
  "id": "57fb19bc1ca44d23b66cad84858d4e72",
  "name": "swift"

Such JSON is valid, but it's not clear why do we need them actually?