Can “\parfillskip=0pt” shorten a short paragraph in plain TeX by two lines?
Udo Wermuth · TUGboat · 2022
The program T E X provides more than a dozen control words for diagnostic and debugging purposes.Some of them are used often, others handle special tasks and are less frequently applied.In the latter case falls the parameter \tracingparagraphs that seems to be a hidden gem.This article explains what the parameter triggers if set and how an author can use the trace data to check and improve his text.