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-rw-r--r--actionpack/lib/abstract_controller/callbacks.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/actionpack/lib/abstract_controller/callbacks.rb b/actionpack/lib/abstract_controller/callbacks.rb
index e4400e8704..715d043b4e 100644
--- a/actionpack/lib/abstract_controller/callbacks.rb
+++ b/actionpack/lib/abstract_controller/callbacks.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
module AbstractController
# = Abstract Controller Callbacks
#