Wrapper script bundled with GNU groff (the free reimplementation of the classic Unix `troff` typesetting system) that automates producing a finished PDF from groff source. Transparently handles multi-pass processing — formatting a table of contents and body text separately, then combining them in the correct final order — and post-processes groff's output stream through Ghostscript to produce the finished PDF. Commonly used for man pages and other troff-formatted technical documents that need a polished, paginated PDF alongside their plain-text form.