test1: ---Assertion failed---
test2: ---
1 mustEqual (2 + 4)
               |
               6
---
test3: ---
(1 + 1) mustEqual 6
   |
   2
---
test4: ---
(1 + 1) mustEqual (2 + 4)
   |                 |
   |                 6
   2
---
test5: ---
"hello".substring(1, 4).length mustEqual "world".length
        |               |                        |
        |               |                        5
        |               3
        ell
---
test6: ---Assertion failed---
test7: ---
1.mustEqual(2 + 4)
              |
              6
---
test8: ---
(1 + 1).mustEqual(6)
   |
   2
---
test9: ---
(1 + 1).mustEqual(2 + 4)
   |                |
   |                6
   2
---
test10: ---
"hello".substring(1, 4).length.mustEqual("world".length)
        |               |                        |
        |               |                        5
        |               3
        ell
---
