Merge pull request #271 from mathiasbynens/patch-1

CONTRIBUTING: Update “adding a Cask” instructions

CONTRIBUTING.md

@@ -16,17 +16,18 @@ Fork the homebrew-cask repository as per instructions in the
 
 ## Adding a Cask
 
-Making a Cask is easy: a Cask is a Ruby file that is only seven lines long.
+Making a Cask is easy: a Cask is a Ruby file that is only eight lines long.
 See the Cask for Alfred.app for an example:
 
-  ```ruby
+```ruby
-  class Alfred < Cask
+class Alfred < Cask
-    url 'http://cachefly.alfredapp.com/alfred_1.3.2_265.zip'
+  url 'http://cachefly.alfredapp.com/alfred_1.3.2_265.zip'
-    homepage 'http://www.alfredapp.com/'
+  homepage 'http://www.alfredapp.com/'
-    version '1.3.2_265'
+  version '1.3.2_265'
-    sha1 'e10f15a0ae758cae2a22557f14890fa5989260ce'
+  sha1 'e10f15a0ae758cae2a22557f14890fa5989260ce'
-  end
+  link :app, 'Alfred.app'
-  ```
+end
+```
 
 ### Preliminary steps