The `assert` keyword

Property definitions

	# The `assert` keyword
	var n_kwassert: TKwassert is writable, noinit

src/parser/parser_nodes.nit:2090,2--2091,46

	redef fun n_kwassert=(node)
	do
		_n_kwassert = node
		node.parent = self
	end

src/parser/parser_prod.nit:3540,2--3544,4