Consider syncing crypto-square

The current example implementation precedes the current canonical tests.

It fails if we attempt to add

```
{
auto theCipher = new Cipher("If man was meant to stay on the ground, god would have given us roots.");
assert("imtgdvs fearwer mayoogo anouuio ntnnlvt wttddes aohghn sseoau " == theCipher.normalize.cipherText());
}
```

but would pass if we instead added

```
{
auto theCipher = new Cipher("If man was meant to stay on the ground, god would have given us roots.");
assert("imtgdvs fearwer mayoogo anouuio ntnnlvt wttddes aohghn sseoau" == theCipher.normalize.cipherText());
}
```

Currently the track does not implement the canonical tests with 0-length output.