cache.rb in jekyll-assets-2.0.0

- old
+ new

@@ -1,3 +1,7 @@
+# Frozen-string-literal: true
+# Copyright: 2012-2015 - MIT License
+# Encoding: utf-8
+
 Jekyll::Assets::Hook.register :env, :init do
   if (cache_dir = asset_config.fetch("cache", ".asset-cache"))
     self.cache = Sprockets::Cache::FileStore.new(jekyll.in_source_dir(cache_dir))
   end