[PATCH 2 of 2 v8] releasenotes: add similarity check function to compare incoming notes

[Yuya Nishihara]

On Sun, 6 Aug 2017 14:34:19 +0530, Rishabh Madan wrote:
> I checked for test-check-* and test-releasenotes-*. I guess I'll run the
> complete test suite next time.

The problem won't be seen if you have the fuzzywuzzy. Our build scripts
load extensions to collect docstrings to be translated for example, which
fails if fuzzywuzzy can't be imported.