fix specs

pkg/utils/utils.go

@@ -174,6 +174,9 @@ func getPadWidths(stringArrays [][]string) []int {
 			maxWidth = len(stringArray)
 		}
 	}
+	if maxWidth-1 < 0 {
+		return []int{}
+	}
 	padWidths := make([]int, maxWidth-1)
 	for i := range padWidths {
 		for _, strings := range stringArrays {

pkg/utils/utils_test.go

@@ -276,8 +276,8 @@ func TestRenderDisplayableList(t *testing.T) {
 				Displayable(&myDisplayable{[]string{"b", "c"}}),
 			},
 			false,
+			"a \nb c",
 			"",
-			"Each item must return the same number of strings to display",
 		},
 		{
 			[]Displayable{