Weird case from a project I recently took over.

There are some HTML tags that are missing their closing '>'
e.g.:

```
<div
  class="example"
</div>

```

This is currently not breaking anything in Chrome but when viewed in IE it has issues.

I've tracked down a number of mistakes with it (looked like copy paste work with an iron-ajax block) but would really like a tool that could help me find other places this is happening.

I currently use Atom but would be willing to use anything to track this down.