Download testgen.l, symtab.[ch], and auxiliary stuff:
wget -r --no-parent -nH http://mmix.cs.hm.edu/mmixmasters/tools/
Install system package flex: sudo apt install flex.
| alias pandoc='pandoc -V papersize:a4 \ | |
| -V documentclass:scrartcl -V classoption:fontsize=14pt \ | |
| -V fontfamily:kpfonts -V fontfamilyoptions:oldstylenums' |