Test invalid JSON

Author: pierrelefevre

alert.json

@@ -4,7 +4,7 @@
             "title": "Introducing VM v2, our freshly baked VM instances",
             "domains": [
                 "cloud.cbh.kth.se",
-                "beta.app.cloud.cbh.kth.se"
+                "beta.app.cloud.cbh.kth.se",
             ],
             "pages": [
                 "/deploy"