added broken test case for #each with tagName=

Presently, if you use `each` with a `tagName`, the opening and closing `<tagName>` and `</tagname>` disappear if the array gets emptied and doesn't return when items are added back to it. I'd take a stab at it, but I remember someone was working on `each`, or reimagining it for use w/ `itemController` or `render`, etc.

![Screen Shot 2013-02-24 at 9 24 54 PM](https://f.cloud.github.com/assets/81818/190493/ac60b326-7ef2-11e2-9daf-b3285d4bc1cb.png)