Plus a test. I didn't notice that Douglas Six did basically the
same thing in another PR (this was a re-do of an earlier PR which
didn't quite do what we'd like). So since I already had it done
and had a test, I closed that PR (#163) and added him to the author
list.
Also - repository.count() raises a NoSuchElementException after you
delete all the documents. That seems like a bug, but we will deal
with that separately.
64a91f1eb6