Comment typo

actionview/lib/action_view/flows.rb

@@ -36,7 +36,7 @@ module ActionView
       @root    = Fiber.current.object_id
     end
 
-    # Try to get an stored content. If the content
+    # Try to get stored content. If the content
     # is not available and we are inside the layout
     # fiber, we set that we are waiting for the given
     # key and yield.
@@ -73,4 +73,4 @@ module ActionView
       Fiber.current.object_id != @root
     end
   end
-end
+end