class Rufo::Formatter

def visit_paren(node)
  # ( exps )
  #
  # [:paren, exps]
  check :on_lparen
  write "("
  next_token
  skip_space_or_newline
  if node[1][0].is_a?(Symbol)
    visit node[1]
  else
    visit_exps node[1], false, false
  end
  skip_space_or_newline
  check :on_rparen
  write ")"
  next_token
end