class ActiveLdap::LdifInvalid

def detect_nearest(line, column)
  lines = @ldif.lines
  nearest = lines[line - 1] || ""
  if column - 1 == nearest.size # for JRuby 1.0.2 :<
    nearest << NEAREST_MARK
  else
    nearest[column - 1, 0] = NEAREST_MARK
  end
  if nearest == NEAREST_MARK
    nearest = "#{lines[line - 2]}#{nearest}"
  end
  nearest
end