Option used to verify glance version is not valid

http://docs.openstack.org/trunk/openstack-compute/install/apt/content/images-verifying-install.html

In the section "Verifying the Image Service Installation", user is requested to issue the following command to verify glance version:

glance --version

glance in Folsom release does not accept the "--version" option and gives an error.

# glance --version
usage: glance [-d] [-v] [-k] [--cert-file CERT_FILE] [--key-file KEY_FILE]
              [--ca-file CA_FILE] [--timeout TIMEOUT] [-f] [--dry-run] [--ssl]
              [-H ADDRESS] [-p PORT] [--os-username OS_USERNAME]
              [-I OS_USERNAME] [--os-password OS_PASSWORD] [-K OS_PASSWORD]
              [--os-tenant-id OS_TENANT_ID] [--os-tenant-name OS_TENANT_NAME]
              [-T OS_TENANT_NAME] [--os-auth-url OS_AUTH_URL] [-N OS_AUTH_URL]
              [--os-region-name OS_REGION_NAME] [-R OS_REGION_NAME]
              [--os-auth-token OS_AUTH_TOKEN] [-A OS_AUTH_TOKEN]
              [--os-image-url OS_IMAGE_URL] [-U OS_IMAGE_URL]
              [--os-image-api-version OS_IMAGE_API_VERSION]
              [--os-service-type OS_SERVICE_TYPE]
              [--os-endpoint-type OS_ENDPOINT_TYPE] [-S OS_AUTH_STRATEGY]
              <subcommand> ...
glance: error: too few arguments