class Rufo::Formatter

def visit_mrhs_add_star(node)
  # [:mrhs_add_star, [], [:vcall, [:@ident, "x", [3, 8]]]]
  _, x, y = node
  if x.empty?
    consume_op "*"
    visit y
  else
    visit x
    write_params_comma
    consume_space
    consume_op "*"
    visit y
  end
end