exercism/exercism.io — pull request #1244 by brettchalupa (2014-01-01 20:11:46+00:00)
Title: Update the Installing Elixir instructions on OS X.

The `erlang` homebrew formula is R16, so the specified -r16 formula does not
exist.

Fixes #1234.

I am not sure if the:

``` sh
brew tap homebrew/versions
brew uninstall erlang
brew link erlang
```

steps are required or not anymore. I would appreciate any insight and thoughts. Thanks!