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-rw-r--r--actioncable/lib/action_cable/subscription_adapter.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actioncable/lib/action_cable/subscription_adapter.rb b/actioncable/lib/action_cable/subscription_adapter.rb
index 596269ab9b..018e8dbe31 100644
--- a/actioncable/lib/action_cable/subscription_adapter.rb
+++ b/actioncable/lib/action_cable/subscription_adapter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
module ActionCable
module SubscriptionAdapter
extend ActiveSupport::Autoload