caching.rb in actionpack-5.2.0.beta1

- old
+ new

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 module ActionController
   # \Caching is a cheap way of speeding up slow applications by keeping the result of
   # calculations, renderings, and database calls around for subsequent requests.
   #
   # You can read more about each approach by clicking the modules below.