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-rw-r--r--actionpack/lib/action_dispatch/middleware/callbacks.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/callbacks.rb b/actionpack/lib/action_dispatch/middleware/callbacks.rb
index ff129cf96a..cc3b344d72 100644
--- a/actionpack/lib/action_dispatch/middleware/callbacks.rb
+++ b/actionpack/lib/action_dispatch/middleware/callbacks.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
module ActionDispatch
# Provides callbacks to be executed before and after dispatching the request.
class Callbacks