Incorrect diff in ES6 template literal syntax highlighting

Could be something RegEx-related that's hanging up the syntax highlighting here. But I'm guessing it's having difficulty handling es6's template literal syntax. Either way, although the code works as expected and doesn't seem to have any syntax errors, we're currently highlighting this section as if there's an unclosed quotation mark somewhere.

Maybe I'm missing some obvious syntax error, but it isn't apparent to me now.