Tartarus CVS: buttress simon

[tartarus-commits-admin@lists.tartarus.org]

CVSROOT:	/home/cvs
Module name:	buttress
Changes by:	simon	01/10/25 20:28:43

Modified files:
	.              : buttress.h contents.c error.c keywords.c main.c 
Added files:
	inputs         : errors2.but 

Log message:
Enforce proper ordering of heading levels: specifically, ensure the
user doesn't skip a heading level (\H before any \C or \A, or \S
straight after \C with no intervening \H). The precise criterion is
that when creating section a.b.c.d, sections a.b.c, a.b and a should
already exist. This ensures the section tree really is a properly
formed tree with no missing nodes.