message: Add scoop to windows installation methods.
diff: @@ -21,7 +21,7 @@ might one _not_ want to install using those instructions?
  demand. If you need to install Rust without access to the internet, `rustup`
  is not suitable.
  - Preference for the system package manager. On Linux in particular, but also on
  - macOS with [Homebrew], and Windows with [Chocolatey], developers sometimes
  + macOS with [Homebrew], and Windows with [Chocolatey] or [Scoop], developers sometimes
  prefer to install Rust with their platform's package manager.
  - Preference against `curl | sh`. On Unix, we usually install `rustup` by
  running a shell script via `curl`. Some have concerns about the security of
  @@ -112,6 +112,7 @@ Past releases can be found in [the archives].
  [`rustup-init.sh`]: https://static.rust-lang.org/rustup/rustup-init.sh
  [homebrew]: http://brew.sh/
  [chocolatey]: http://chocolatey.org/
  +[scoop]: https://scoop.sh/
  [three tiers]: https://forge.rust-lang.org/platform-support.html
  [rust signing key]: https://static.rust-lang.org/rust-key.gpg.ascii
  [gpg]: https://gnupg.org/
  