Update tests.json

Author: sonnyp

tests.json

@@ -107,7 +107,7 @@
       "patch": [{"op": "add", "path": "/0", "value": "bar"}],
       "expected": ["bar", "foo", "sil"] },
 
-    { "comment": "push item to array via last index + 1"
+    { "comment": "push item to array via last index + 1",
       "doc": ["foo", "sil"],
       "patch": [{"op":"add", "path": "/2", "value": "bar"}],
       "expected": ["foo", "sil", "bar"] },