wrap

# File lib/rdoc/markup/to_rdoc.rb, line 265
  def wrap text
    return unless text && !text.empty?

    text_len = @width - @indent

    text_len = 20 if text_len < 20

    re = /^(.{0,#{text_len}})[ \n]/
    next_prefix = ' ' * @indent

    prefix = @prefix || next_prefix
    @prefix = nil

    @res << prefix

    while text.length > text_len
      if text =~ re then
        @res << $1
        text.slice!(0, $&.length)
      else
        @res << text.slice!(0, text_len)
      end

      @res << "\n" << next_prefix
    end

    if text.empty? then
      @res.pop
      @res.pop
    else
      @res << text
      @res << "\n"
    end
  end