"\n \r\n \r \u2028".split() should have been "\n \r\n \r \u2028".split(" "), i.e. a list of different line ends.

> The purpose of these tests is not entirely clear, so I'm not sure that it is properly grasped the idea of the author.

I wrote the tests nearly 10 years ago, so it's no longer entirely clear to me either! ;)

Anyway, here's a patch that fixes the resulting test failures.