message: cryptography.examples.demo.crypt: Move user from try / chatch.
diff: @@ -66,14 +66,14 @@ key(bool verify)
  int
  main(int argc, char* argv[])
  -{
  - try
  {
  if (argc != 3)
  {
  - std::cerr << "Usage: " << argv[0] << " [--encipher|--decipher] message" << std::endl;
  + std::cerr << "Usage: " << argv[0] << " [--encipher|--decipher] message\n";
  return 1;
  }
  + try
  + {
  if (argv[1] == std::string{"--encipher"})
  {
  auto secret = key(true);
  