Summary
- more accurate HTML rendering;
- clarified markup;
- clarified rendering, notably of \<^latex>CARTOUCHE in outer syntax;
- tuned;
- clarified spell-checking (see also 30233285270a);
- more accurate markup;
- clarified signature;
- more markup for various text kinds, notably for nested formal comments;
- tuned whitespace;
- clarified rendering: use COMMENT4 elsewhere;
- documentation of document markers and re-interpreted command tags;