du­pli­cat – Make du­pli­cate page num­bers dis­tinct

The pack­age ar­ranges that all pages’ num­bers are dis­tinct (as far as out­put drivers is con­cerned), by us­ing \count 1 as a run­ning page num­ber. (Dvips dis­tin­guishes such du­pli­cates any­way, so that the pack­age is not nec­es­sary if you are us­ing dvips for out­put.
The pack­age is part of the piff bun­dle.