docs: def gpg_fingerprint(key):
      """Validates a GPG key fingerprint
  
      This handles both pre and post GPG 2.1"""
      if (len(key) == 8 and re.match(r'^[0-9A-F]{8}$', key)) or \
         (len(key) == 40 and re.match(r'^[0-9A-F]{40}$', key)):
          return
  
      raise aomi.exceptions.Validation('Invalid GPG Fingerprint')