MAYOR LUKE RAVENSTAHL of Pittsburgh, known as well for his literary accomplishments as for his political acumen, has completed his new translation of J. K. Huysman’s famous novel Là-Bas into the Pittsburgh dialect. The translation, under the title Dahnnaire, will be sold in a limited edition of 300 copies bound in vellum and served with French fries and cole slaw between two slices of Italian bread.