Duplicate lines emitted by cli_show_config (cli output style) when yang list element has composite key

[pheller]

Given the openconfig-system and openconfig-system-logging modules, there is the following schema (excerpt):

      list selector {
        key "facility severity";
        description
          "List of selectors for log messages";

Given the following configuration that utilizes this schema:

set system logging console selectors selector oc-log:USER EMERGENCY
set system logging console selectors selector oc-log:USER EMERGENCY config facility oc-log:USER
set system logging console selectors selector oc-log:USER EMERGENCY config severity EMERGENCY

show configuration cli returns the following response:

system logging console selectors selector oc-log:USER EMERGENCY
system logging console selectors selector oc-log:USER EMERGENCY
system logging console selectors selector oc-log:USER EMERGENCY config facility oc-log:USER
system logging console selectors selector oc-log:USER EMERGENCY config severity EMERGENCY

whereas show configuration text correctly returns the following response (excerpted):

    logging {
        console {
            selectors {
                selector {
                    facility oc-log:USER;
                    severity EMERGENCY;
                    config {
                        facility oc-log:USER;
                        severity EMERGENCY;
                    }
                }
            }
        }
    }