The `intrude` keyword

Property definitions

	# The `intrude` keyword
	var n_kwintrude: TKwintrude is writable, noinit

src/parser/parser_nodes.nit:1233,2--1234,48

	redef fun n_kwintrude=(node)
	do
		_n_kwintrude = node
		node.parent = self
	end

src/parser/parser_prod.nit:371,2--375,4