The `abort` keyword

Property definitions

	# The `abort` keyword
	var n_kwabort: TKwabort is writable, noinit

src/parser/parser_nodes.nit:1927,2--1928,44

	redef fun n_kwabort=(node)
	do
		_n_kwabort = node
		node.parent = self
	end

src/parser/parser_prod.nit:2883,2--2887,4