Incorrect usage of the term 'sut' (System Under Test) in ZipperTests.fs #1003
Description
Within ZipperTests.fs (of the zipper exercise) the result of calling a function (that is the actual System Under Test) is placed in a variable called sut. This is than later compared to an expected value.
The sut variable should in fact be called actual, so you can compare this actual to the expected, as is common within writing unit tests.