We do a lot of this kind of string-joining for html-build in [unit tests](https://github.com/wymeditor/wymeditor/blob/master/src/test/unit/specific_feature_tests/lists.js#L176), but I'm not super happy with it. Ideally, the multi-line string method we use would:

* Allow us to indent HTML to indicate nesting
* Not make diffs super ugly
* Pass jshint

I'll see if [this method](http://stackoverflow.com/a/2425159/386925) passes jshint with indentation.