FuzzTest.whitespaceTest never runs, and fails if it's added.

https://github.com/elm-explorations/test/blob/master/tests/src/FuzzerTests.elm#L247 `whitespaceTest` isn't run when `npm test` is run on master. The test fails when I run it. Not sure what the history of this test is, or what we should do about it now.

Start with tests/src/FuzzerTests.elm around line 247 and inspect how npm test discovers and runs fuzz tests. Run npm test and then run whitespaceTest in isolation to reproduce its failure. Done means deciding whether the test should be restored, fixed, or removed, and ensuring the chosen behavior is covered by the test suite.

Written by the indexing model from the issue text.