U luatex/src/libs/lua51/lstrlib.c U luatex/src/texk/web2c/luatexdir/lua/lstatslib.c U luatex/src/texk/web2c/luatexdir/lua/llualib.c U luatex/src/texk/web2c/luatexdir/lua/luastuff.c U luatex/manual/luatexref-t.tex U luatex/manual/luatexref-t.pdf Checked out revision 198.