The `do` keyword

Property definitions

	# The `do` keyword
	var n_kwdo: TKwdo is writable, noinit

src/parser/parser_nodes.nit:2079,2--2080,38

	redef fun n_kwdo=(node)
	do
		_n_kwdo = node
		node.parent = self
	end

src/parser/parser_prod.nit:3469,2--3473,4