Fix ActiveResource::Errors deprecation messages

activeresource/lib/active_resource/validations.rb

@@ -4,7 +4,7 @@ module ActiveResource
 
   # Active Resource validation is reported to and from this object, which is used by Base#save
   # to determine whether the object in a valid state to be saved. See usage example in Validations.  
-  class Errors < ::ActiveModel::Errors
+  class Errors < ActiveModel::Errors
     # Grabs errors from the XML response.
     def from_xml(xml)
       clear
@@ -38,7 +38,7 @@ module ActiveResource
   #   person.errors.empty?          # => false
   #   person.errors.count           # => 1
   #   person.errors.full_messages   # => ["Last name can't be empty"]
-  #   person.errors.on(:last_name)  # => "can't be empty"
+  #   person.errors[:last_name]  # => ["can't be empty"]
   #   person.last_name = "Halpert"  
   #   person.save                   # => true (and person is now saved to the remote service)
   #

activeresource/test/base_errors_test.rb

@@ -21,9 +21,9 @@ class BaseErrorsTest < Test::Unit::TestCase
 
   def test_should_parse_errors_to_individual_attributes
     assert @person.errors.invalid?(:name)    
-    assert_equal "can't be blank", @person.errors.on(:age)
+    assert_equal ["can't be blank"], @person.errors[:age]
     assert_equal ["can't be blank", "must start with a letter"], @person.errors[:name]
-    assert_equal "Person quota full for today.", @person.errors.on_base
+    assert_equal ["Person quota full for today."], @person.errors[:base]
   end
 
   def test_should_iterate_over_errors