Transpose: An empty slice passes all the tests

[mikejoh12]

The tests for Transpose all pass with a function returning an empty slice. To reproduce, run the tests with the code below which will pass:

func Transpose(input []string) []string {
   return []string{}
}

The likely cause appears to be the || conditional in the TestTranspose function:

if len(actual) == 0 || len(tc.expected) == 0 {
   return
}