Revert to use === only here because of perf. :(

actionpack/lib/action_view/path_set.rb

-require "active_support/core_ext/array/wrap"
-
 module ActionView #:nodoc:
   # = Action View PathSet
   class PathSet < Array #:nodoc:
@@ -17,7 +15,7 @@ def find(*args)
     end
 
     def find_all(path, prefixes = [], *args)
-      prefixes = Array.wrap(prefixes)
+      prefixes = [prefixes] if String === prefixes
       prefixes.each do |prefix|
         each do |resolver|
           templates = resolver.find_all(path, prefix, *args)