Create a link from a ... node to a mentity

Property definitions

nitc $ InheritanceGraph :: from_dotdotdot
	# Create a link from a `...` node to a `mentity`
	fun from_dotdotdot(mentity: MEntity): DotEdge do
		var nfrom = draw_node(mentity)
		var dots = to_dots.get_or_null(mentity)
		if dots == null then
			dots = dotdotdot("...{nfrom.id}")
			from_dots[mentity] = dots
		end
		graph.add dots
		var edge = new DotEdge(dots, nfrom)
		graph.add edge
		return edge
	end
src/doc/commands/commands_graph.nit:331,2--343,4