Removed repeated word 'done' from Active Storage guide [ci skip]

abhaynikam · abhaynikam · commit 40e12c2ff9f9 · 2019-10-02T12:32:24.000+05:30
diff --git a/guides/source/active_storage_overview.md b/guides/source/active_storage_overview.md
@@ -338,7 +338,7 @@ Call `images.attached?` to determine whether a particular message has any images
 @message.images.attached?
 ```
 
-Overriding the default service is done done the same way as `has_one_attached`, by using the `service` option:
+Overriding the default service is done the same way as `has_one_attached`, by using the `service` option:
 
 ```ruby
 class Message < ApplicationRecord
