Add a test to specify behaviour for zero-dimensional arrays

Author: LukeMathWalker

src/arrayformat.rs

@@ -231,6 +231,15 @@ mod formatting_with_omit {
         println!("Expected output:\n{}\nActual output:\n{}", expected, actual);
     }
 
+    #[test]
+    fn dim_0() {
+        let element = 12;
+        let a = arr0(element);
+        let actual_output = format!("{}", a);
+        let expected_output = format!("{}", element);
+        assert_eq!(actual_output, expected_output);
+    }
+
     #[test]
     fn dim_1() {
         let overflow: usize = 5;