Hi! This is a »do-it-for-me-pleeaaase» kind of question.
I'd like to test the development version of pdflatex and lualatex, see here: https://tex.stackexchange.com/q/506646/4736 The article by Frank Mittelbach (here: https://tug.org/members/TUGboat/tb41-2/ tb128mitt-quovadis.pdf) was to interesting to resist, but after investigating about how to implement the necessary commands in AUCTeX, I got stuck in commands like Name: LaTeX Command: %`%l%(mode)%' %T Ahem, whut? This is from customization of TeX-command-list. The trick seems to change the command from 'pdflatex ...' to pdflatex-dev ...', but it would take much time for me to figure it out. Maybe for a reader of this list it is an easy exercise to provide the lisp code to make it possible to write on a per file basis % Local Variables: % TeX-engine: luatex-dev % End: or % Local Variables: % TeX-engine: pdftex-dev % End: and the file is compiled with lualatex-dev or pdflatex-dev? Thank you! Regards, Alexander