Visit explicit receiver, implicit self will be ignored.

Property definitions

nitc $ PrettyPrinterVisitor :: visit_recv
	# Visit explicit receiver, implicit self will be ignored.
	fun visit_recv(n_expr: AExpr) do
		if not n_expr isa AImplicitSelfExpr then
			visit n_expr
			consume "."
		end
	end
src/pretty.nit:272,2--278,4