chunk() --> chuncker() to resolve undefined name

flake8 results:
```
./ciphers/playfair_cipher.py:88:25: F821 undefined name 'chunk'
    for char1, char2 in chunk(ciphertext, 2):
                        ^
```
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cclauss 2017-11-25 12:15:41 +01:00 committed by GitHub
parent a03b2eafc0
commit aed9cb16ec
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@ -85,7 +85,7 @@ def decode(ciphertext, key):
plaintext = ""
# https://en.wikipedia.org/wiki/Playfair_cipher#Description
for char1, char2 in chunk(ciphertext, 2):
for char1, char2 in chunker(ciphertext, 2):
row1, col1 = divmod(table.index(char1), 5)
row2, col2 = divmod(table.index(char2), 5)