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-rw-r--r--activesupport/lib/active_support/deprecation/instance_delegator.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/deprecation/instance_delegator.rb b/activesupport/lib/active_support/deprecation/instance_delegator.rb
index 6d390f3b37..8beda373a2 100644
--- a/activesupport/lib/active_support/deprecation/instance_delegator.rb
+++ b/activesupport/lib/active_support/deprecation/instance_delegator.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "active_support/core_ext/kernel/singleton_class"
require "active_support/core_ext/module/delegation"