class ActiveLdap::LdifInvalid

def numbered_ldif
  return @ldif if @ldif.blank?
  lines = @ldif.lines
  format = "%#{Math.log10(lines.size).truncate + 1}d: %s"
  i = 0
  lines.collect do |line|
    i += 1
    format % [i, line]
  end.join
end