Re: Prefer luatex for documentation

[Werner LEMBERG]

> Luatex is always available with modern tex distros (say at least 5
> yrs probably more).  In fact pdftex _is_ luatex...

???  Definitely not.

```
> pdftex --version
pdfTeX 3.141592653-2.6-1.40.24 (TeX Live 2022)
kpathsea version 6.3.4
Copyright 2022 Han The Thanh (pdfTeX) et al.
There is NO warranty.  Redistribution of this software is
covered by the terms of both the pdfTeX copyright and
the Lesser GNU General Public License.
For more information about these matters, see the file
named COPYING and the pdfTeX source.
Primary author of pdfTeX: Han The Thanh (pdfTeX) et al.
Compiled with libpng 1.6.37; using libpng 1.6.37
Compiled with zlib 1.2.11; using zlib 1.2.11
Compiled with xpdf version 4.03


> luatex --version
This is LuaTeX, Version 1.15.0 (TeX Live 2022)
Development id: 7509

Execute  'luatex --credits'  for credits and version details.

There is NO warranty. Redistribution of this software is covered by
the terms of the GNU General Public License, version 2 or (at your option)
any later version. For more information about these matters, see the file
named COPYING and the LuaTeX source.

LuaTeX is Copyright 2022 Taco Hoekwater and the LuaTeX Team.
```


    Werner