```ruby
class Gitbox < Cask
  url 'http://d1oa71y4zxyi0a.cloudfront.net/gitbox-1.6.2-ml.zip'
  homepage 'http://gitboxapp.com/'
  version '1.6.2'
  sha1 '20fdea01bf3b26f6ba23fa2b909a7d56cddb6250'
  link :app, 'Gitbox.app'
end
```

Simplify link :app, to link
user
```ruby
class Gitbox < Cask
  url 'http://d1oa71y4zxyi0a.cloudfront.net/gitbox-1.6.2-ml.zip'
  homepage 'http://gitboxapp.com/'
  version '1.6.2'
  sha1 '20fdea01bf3b26f6ba23fa2b909a7d56cddb6250'
  link 'Gitbox.app'
end
```
assistant