checkout fails on windows

[isaacs]

test/fixtures/files/long-path/r/e/a/l/l/y/-/d/e/e/p/-/f/o/l/d/e/r/-/p/a/t/h/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxcccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc is too long, it seems.

See if there's a way to get rid of that file, possibly by just mocking the fs in the tests that use it or something?