Merge pull request rails#19443 from radanskoric/fix-am-errors-deprecation

Fix ActiveModel::Errors deprecation messages failing when used on its own

Author: carlosantoniodasilva

activemodel/lib/active_model/errors.rb

@@ -3,6 +3,7 @@
 require 'active_support/core_ext/array/conversions'
 require 'active_support/core_ext/string/inflections'
 require 'active_support/core_ext/object/deep_dup'
+require 'active_support/core_ext/string/filters'
 
 module ActiveModel
   # == Active \Model \Errors