Make password messages translatable.

activemodel/lib/active_model/locale/en.yml

@@ -25,3 +25,7 @@ en:
       less_than_or_equal_to: "must be less than or equal to %{count}"
       odd: "must be odd"
       even: "must be even"
+
+    attributes:
+      password:
+        unsecure: "is too weak and common"

activemodel/lib/active_model/secure_password.rb

@@ -63,8 +63,8 @@ def password=(unencrypted_password)
 
     def password_must_be_strong
       if password.present?
-        errors.add(:password, "must be longer than 6 characters") unless password.size > 6
-        errors.add(:password, "is too weak and common") if WEAK_PASSWORDS.include?(password)
+        errors.add(:password, :too_short, :count => 7) unless password.size > 6
+        errors.add(:password, :unsecure) if WEAK_PASSWORDS.include?(password)
       end
     end
   end

activemodel/test/cases/secure_password_test.rb

@@ -36,7 +36,7 @@ class SecurePasswordTest < ActiveModel::TestCase
   test "too weak passwords" do
     @user.password = "012345"
     assert !@user.valid?
-    assert_equal ["must be longer than 6 characters"], @user.errors[:password]
+    assert_equal ["is too short (minimum is 7 characters)"], @user.errors[:password]
 
     @user.password = "password"
     assert !@user.valid?