Steps to reproduce:

Create a diff that includes Javascript with ES6 template strings `like this`.

Expected behavior:
Template strings are highlighted like a string

Actual behavior:
Backticks are ignored, sometimes causing syntax highlighting to break completely, like if there is an unmatched single or double quote in the string.

Version:
phabricator 2d495e97014d2834f76cdff9bc392a16b51428df (Fri, Jan 15)

arcanist b87138356a9c71ad5e08eaa05399d0233529bc71 (Fri, Jan 15)

phutil c3fd3a8bb2c319982279ead972354c8bf760145c (Thu, Jan 14)