[Crypto Square] exercise is lacking a test for empty text after normalized

For exercise Crypto Square there is no test case for plaintext made up of just spaces and punctuation.

There are tests for normalized input - one for removing spaces, and one for removing punctuation, but not for the case text is empty after normalized. Mentored someone with code that pass all tests, but have a bug in this case, so wanted to add this.

I’m new to to exercism github contribute, so not sure about a lot of stuff… I saw in another issue that test maybe taken form problem-specifications repo, so I posted a PR there: https://github.com/exercism/problem-specifications/pull/2129 But if test for Python track should be PRed here, please tell me.

My original intention was to update: https://github.com/exercism/python/blob/main/exercises/practice/crypto-square/crypto_square_test.py by adding this code to CryptoSquareTest class

def test_empty_plaintext_after_normalized(self):
    value = "... --- ..."
    expected = ""
    self.assertEqual(cipher_text(value), expected)

[BethanyG]

I just became the third approver. I’ve also merged it in. Thanks again for the PR! ⭐ 🌈

[izmirli]

@BethanyG – Thanks for your good intentions! There is no rush, so only if and when you’ll have free time. BTW, there are already 2 approvals for the PR.