Use :send to invoke :remove_instance_variable on PaperTrail; prevents errors on Ruby19

lib/paper_trail.rb

@@ -103,10 +103,10 @@ end
 
 # Ensure `ProtectedAttributes` gem gets required if it is available before the `Version` class gets loaded in
 unless PaperTrail.active_record_protected_attributes?
-  PaperTrail.remove_instance_variable(:@active_record_protected_attributes)
+  PaperTrail.send(:remove_instance_variable, :@active_record_protected_attributes)
   begin
     require 'protected_attributes'
-  rescue LoadError; end # will rescue if ProtectedAttributes gem is not available
+  rescue LoadError; end # will rescue if `ProtectedAttributes` gem is not available
 end
 
 require 'paper_trail/version'

test/test_helper.rb

@@ -3,16 +3,11 @@ ENV["RAILS_ENV"] = "test"
 
 require File.expand_path("../dummy/config/environment.rb",  __FILE__)
 require "rails/test_help"
-
-#ActionMailer::Base.delivery_method = :test
-#ActionMailer::Base.perform_deliveries = true
-#ActionMailer::Base.default_url_options[:host] = "test.com"
-
-Rails.backtrace_cleaner.remove_silencers!
-
 require 'shoulda'
 require 'ffaker'
 
+Rails.backtrace_cleaner.remove_silencers!
+
 # Run any available migration
 ActiveRecord::Migrator.migrate File.expand_path("../dummy/db/migrate/", __FILE__)