Variable SETFACL_USAGE`Const`

SETFACL_USAGE: string = 'setfacl: usage: setfacl -m u:<user>:r|g:<group>:r|o::r|o::- <path>... | setfacl -x u:<user>|g:<group> <path>...'

How setfacl is spelled, for help and for errors.