Use \A and \z in regexp for stricter matching

* While \A and ^ are the same, there is a difference between \z and $

  Using $ it will match the "end of line", which means that this would
  match strings like: "en-US\n". While \z means "end of string" and it
  will not match that, and will only match "en-US".

  I would assert that most of the time when using anchors you would want
  to use \A and \z, only falling back to ^ and $ in specific cases.

app/models/common/language.rb

@@ -10,7 +10,7 @@ class Language
   property :name, String, :required => true
 
   # locale string like 'en-US'
-  validates_format_of :code, :with => /^[a-z]{2}-[A-Z]{2}$/
+  validates_format_of :code, :with => /\A[a-z]{2}-[A-Z]{2}\z/
 
 
   def self.[](code)