agent-update: wrong help message for AGENT arg "ID or name of agent to update"

agent-update command takes only ID to specify an agent, but the help message says "ID or name".

(.venv)ubuntu@dev07:~/python-neutronclient (master)$ neutron help agent-update
usage: neutron agent-update [-h] [--request-format {json,xml}]
                            [--admin-state-down] [--description DESCRIPTION]
                            AGENT

Updates the admin status and description for a specified agent.

positional arguments:
  AGENT ID or name of agent to update.

optional arguments:
  -h, --help show this help message and exit
  --request-format {json,xml}
                        The XML or JSON request format.
  --admin-state-down Set admin state up of the agent to false.
  --description DESCRIPTION
                        Description for the agent.