class Rufo::Formatter

def visit_comma_separated_list(nodes)
  # When there's *x inside a left hand side assignment
  # or a case when, it comes as [:op, ...]
  if nodes[0].is_a?(Symbol)
    visit nodes
    return
  end
  needs_indent = false
  if newline? || comment?
    needs_indent = true
    base_column = next_indent
    consume_end_of_line
    write_indent(base_column)
  else
    base_column = @column
  end
  nodes.each_with_index do |exp, i|
    maybe_indent(needs_indent, base_column) do
      if block_given?
        yield exp
      else
        visit exp
      end
    end
    next if last?(i, nodes)
    skip_space
    check :on_comma
    write ","
    next_token
    first_space = current_token if space?
    skip_space
    if newline? || comment?
      indent(base_column || @indent) do
        consume_end_of_line(want_multiline: false)
        write_indent
      end
    elsif first_space && @preserve_whitespace
      write_space first_space[2]
      skip_space_or_newline
    else
      write_space
      skip_space_or_newline
    end
  end
end