 TeX source code by Donald E. Knuth

Original literate WEB program for TeX82. Header records copyright 1982 and release history through version 3.141592653 (January 2021). Named code sections and identifiers provide stable locators: penalty_node, badness, try_break, fit_class, adj_demerits, glue_set. Official distribution directory: ctan.org/tex-archive/systems/knuth/dist/tex .