Unescape paths before writing cache to file system. Closes #1877.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2544 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

 *SVN*
 
+* Unescape paths before writing cache to file system. #1877. [Damien Pollet]
+
 * Wrap javascript_tag contents in a CDATA section and add a cdata_section method to TagHelper #1691 [Michael Schuerig, Sam Stephenson]
 
 * Misc doc fixes (typos/grammar/etc). #2445. [coffee2code]

actionpack/lib/action_controller/caching.rb

@@ -101,7 +101,7 @@ def caches_page(*actions)
         
         private
           def page_cache_file(path)
-            name = ((path.empty? || path == "/") ? "/index" : path)
+            name = ((path.empty? || path == "/") ? "/index" : URI.unescape(path))
             name << page_cache_extension unless (name.split('/').last || name).include? '.'
             return name
           end