message: fix small typo
  master version description: from "This all of the current" to "This *is* all of the current"
diff: @@ -31,7 +31,7 @@ Reactive Extensions Library for JavaScript. This is a rewrite of [Reactive-Exten
  ## Versions In This Repository
  -- [master](https://github.com/ReactiveX/rxjs/commits/master) - This all of the current, unreleased work, which is against v6 of RxJS right now
  +- [master](https://github.com/ReactiveX/rxjs/commits/master) - This is all of the current, unreleased work, which is against v6 of RxJS right now
  - [stable](https://github.com/ReactiveX/rxjs/commits/stable) - This is the branch for the latest version you'd get if you do `npm install rxjs`
  ## Important
  