I would like to find out what options there are for applying syntax highlighting to Plain TeX, to turn Plain TeX documents into highlighted HTML.
The aim is to facilitate sharing tracked changes to the Plain TeX document. The document I wish to work with is fairly simple, but it does hand define several fonts, a bibliography environment, and make heavy use of
\halign macros. Some automatic or semi-automatic handling of these would be an advantage. At a pinch I could do this with a
sed script, but I would rather save myself some time.
Pygments does not seem to have support for Plain TeX. Emacs' AUCTeX has
TeX-mode for Plain TeX, but although I seem to recall that it is possible to export HTML from AUCTeX, I cannot recall any details.