# File lib/asciidoctor/reader.rb, line 85
  def prepare_lines data, opts = {}
    if ::String === data
      if opts[:normalize]
        Helpers.normalize_lines_from_string data
      else
        data.split LF, -1
      end
    else
      if opts[:normalize]
        Helpers.normalize_lines_array data
      else
        data.dup
      end
    end
  end