Ah oops -- so this section of the readme is auto-copied from the API.md when we push the site.

It looks like I [inadvertently] added that update in with https://github.com/facebook/jest/commit/d53ef1efe86e328de8764d05876c1d604a245657 (which must the first commit I made after publishing the site). In any case, I think if you rebase it should swallow this change (and un-gray the github "merge" button)