3 files changed, 3 insertions, 3 deletions
diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb
index 026f077ee7..d327913824 100644
--- a/activemodel/lib/active_model/dirty.rb
+++ b/activemodel/lib/active_model/dirty.rb
@@ -1,6 +1,7 @@
 require 'active_model/attribute_methods'
 require 'active_support/hash_with_indifferent_access'
 require 'active_support/core_ext/object/duplicable'
+require 'active_support/core_ext/object/blank'
 
 module ActiveModel
   # == Active Model Dirty
@@ -98,7 +99,7 @@ module ActiveModel
     #   person.name = 'bob'
     #   person.changed? # => true
     def changed?
-      changed_attributes.any?
+      changed_attributes.present?
     end
 
     # List of attributes with unsaved changes.
diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index 042f9cd7e2..016bf87d86 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -286,7 +286,7 @@ module ActiveModel
     #     "Name is invalid"
     def full_message(attribute, message)
       return message if attribute == :base
-      attr_name = attribute.to_s.gsub('.', '_').humanize
+      attr_name = attribute.to_s.tr('.', '_').humanize
       attr_name = @base.class.human_attribute_name(attribute, :default => attr_name)
       I18n.t(:"errors.format", {
         :default   => "%{attribute} %{message}",
diff --git a/activemodel/lib/active_model/naming.rb b/activemodel/lib/active_model/naming.rb
index adf000e53c..5665e10002 100644
--- a/activemodel/lib/active_model/naming.rb
+++ b/activemodel/lib/active_model/naming.rb
@@ -1,7 +1,6 @@
 require 'active_support/inflector'
 require 'active_support/core_ext/hash/except'
 require 'active_support/core_ext/module/introspection'
-require 'active_support/core_ext/module/deprecation'
 require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/object/blank'