wrap

# File lib/rdoc/ri/formatter.rb, line 289
  def wrap(txt, prefix=@indent, linelen=@width)
    return unless txt && !txt.empty?

    txt = add_attributes_to(txt)
    next_prefix = prefix.tr("^ ", " ")
    linelen -= prefix.size

    line = []

    until txt.empty?
      word = txt.next_word
      if word.size + line.size > linelen
        write_attribute_text(prefix, line)
        prefix = next_prefix
        line = []
      end
      line.concat(word)
    end

    write_attribute_text(prefix, line) if line.length > 0
  end