Address PR comments.

Author: Nicholas Stuart

activesupport/CHANGELOG.md

@@ -3,6 +3,8 @@
     Previously, if you provided a `error_handler` to `redis_cache_store`, any errors thrown by
     the error handler would be rescued and logged only. Removed the `rescue` clause from `handle_exception`
     to allow these to be thrown. 
+    
+    *Nicholas A. Stuart*
 
 *   Allow entirely opting out of deprecation warnings.
 

guides/source/caching_with_rails.md

@@ -528,6 +528,7 @@ config.cache_store = :redis_cache_store, { url: cache_servers,
   read_timeout:       0.2, # Defaults to 1 second
   write_timeout:      0.2, # Defaults to 1 second
   reconnect_attempts: 1,   # Defaults to 0
+                                           
   error_handler: -> (method:, returning:, exception:) {
     # Report errors to Sentry as warnings
     Raven.capture_exception exception, level: 'warning',