It looks like `\partial` produces a false positive because it contains `\part`: <img width="179" alt="image" src="https://user-images.githubusercontent.com/15056323/56274505-1e224480-60ff-11e9-9965-a758ed3ba7b4.png"> <img width="274" alt="image" src="https://user-images.githubusercontent.com/15056323/56274524-28dcd980-60ff-11e9-814f-88da942dbedf.png">
