By 'update', do you mean to change

+Due to the way releases are made on different platforms, we sometimes test
+files on a *nix system with Windows file endings. Unfortunately, that leaves
+some of the test files broken:

to something like

+Issue8473: Make sure doctest works with mixed line endings.
+When this test is run on *nix, it has the side effect of making sure
+that doctest can handle Windows line endings on *nix.

Or just leave the last two lines off?

And also change '/r/n/r/n' x 2 to '/r/n/n' and '/n/r/n'.