Added irregular zombie inflection, so zombies no longer gets singularized into zomby

activesupport/lib/active_support/inflections.rb

@@ -54,6 +54,7 @@ module ActiveSupport
     inflect.irregular('sex', 'sexes')
     inflect.irregular('move', 'moves')
     inflect.irregular('cow', 'kine')
+    inflect.irregular('zombie', 'zombies')
 
     inflect.uncountable(%w(equipment information rice money species series fish sheep jeans))
   end