collect_first_comment

# File lib/rdoc/parser/ruby.rb, line 1488
  def collect_first_comment
    skip_tkspace
    res = ''
    first_line = true

    tk = get_tk

    while TkCOMMENT === tk
      if first_line and tk.text =~ /\A#!/ then
        skip_tkspace
        tk = get_tk
      elsif first_line and tk.text =~ /\A#\s*-\*-/ then
        first_line = false
        skip_tkspace
        tk = get_tk
      else
        first_line = false
        res << tk.text << "\n"
        tk = get_tk

        if TkNL === tk then
          skip_tkspace false
          tk = get_tk
        end
      end
    end

    unget_tk tk

    res
  end