```ruby
class Macvim < Cask
  url 'https://macvim.googlecode.com/files/MacVim-snapshot-67.tbz'
  homepage 'http://code.google.com/p/macvim/'
  version '7.3-67'
  sha1 '3cdbe5d81222dcf7ddb41edaf944c8d996a1f324'
  link 'MacVim.app'
end
```

Bump MacVim Cask to snapshot 68
user
```ruby
class Macvim < Cask
  url 'https://macvim.googlecode.com/files/MacVim-snapshot-68-Mountain-Lion.tbz'
  homepage 'http://code.google.com/p/macvim/'
  version '7.4a-68'
  sha1 '52dd8a7853053ff34818f42e454ae80842d01633'
  link 'MacVim.app'
end
```
assistant