# Collect block line text.
	fun text: String do
		var text = new FlatBuffer
		var line = first_line
		while line != null do
			if not line.is_empty then
				text.append line.text
			end
			text.append "\n"
			line = line.next
		end
		var block = first_block
		while block != null do
			text.append block.text
			text.append "\n"
			block = block.next
		end
		return text.write_to_string
	end