[docs] [issue29062] hashlib documentation link error

[Christian Heimes]

Christian Heimes added the comment:

Go ahead if it makes your work easier. I kept the file separate because the blake2 documentation is maintained externally. It's not going to change any time soon, though. Let's merge it.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29062>
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