class Rufo::Formatter

def visit_paren(node)
  # ( exps )
  #
  # [:paren, exps]
  _, exps = node
  consume_token :on_lparen
  skip_space_or_newline
  heredoc = current_token_kind == :on_heredoc_beg
  if exps
    visit_exps to_ary(exps), with_lines: false
  end
  skip_space_or_newline
  write "\n" if heredoc
  consume_token :on_rparen
end