# Recursively generate a level in the file tree of the *content* section
	private fun gen_content_level(ot: OrderedTree[MConcern], os: Array[Object], res: Template)
	do
		res.add "<ul>\n"
		for o in os do
			res.add "<li>"
			if o isa MGroup then
				var d = ""
				var mdoc = o.mdoc
				if mdoc != null then d = ": {mdoc.html_synopsis.write_to_string}"
				res.add "<strong>{o.name}</strong>{d} ({o.filepath.to_s})"
			else if o isa MModule then
				var d = ""
				var mdoc = o.mdoc
				if mdoc != null then d = ": {mdoc.html_synopsis.write_to_string}"
				res.add "<strong>{o.name}</strong>{d} ({o.filepath.to_s})"
			else
				abort
			end
			var subs = ot.sub.get_or_null(o)
			if subs != null then gen_content_level(ot, subs, res)
			res.add "</li>\n"
		end
		res.add "</ul>\n"
	end