docs: def description_of(file, name='stdin'):
      """Return a string describing the probable encoding of a file."""
      u = UniversalDetector()
      for line in file:
          u.feed(line)
      u.close()
      result = u.result
      if result['encoding']:
          return '%s: %s with confidence %s' % (name,
                                                result['encoding'],
                                                result['confidence'])
      else:
          return '%s: no result' % name