Dear list,
Running the following program with plain luatex:
-----------------------------------------------------------------
\directlua{ tex.scantoks(0,0,'\string\\unknown \string\\relax') }
\showthe\toks0
\bye
-----------------------------------------------------------------
results in the following:
-----------------------------------------------------------------
This is LuaTeX, Version 1.13.0 (TeX Live 2021/dev)
restricted system commands enabled.
(./test.tex
BADunknown \relax .
l.2 \showthe\toks0
-----------------------------------------------------------------
As you see, the backslash preceding the unknown control sequence has
turned into something confusing. What is this BAD thing? Is this the
intended behaviour?
Warm regards,
Esger Renkema
