for .Rd, normally I do not need the changes in the PR, since I often use the development version of roxygen2 and have my own method of roxygenization. I'll roxygenize it by myself later.

You may `git reset --soft` and [`git push --force`](http://devopsreactions.tumblr.com/post/78534868650/git-push-force) after you fix the `is()` issue and discard Rd changes. Thanks!