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-rw-r--r--actioncable/lib/action_cable/subscription_adapter/async.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/actioncable/lib/action_cable/subscription_adapter/async.rb b/actioncable/lib/action_cable/subscription_adapter/async.rb
index 10b3ac8cd8..c9930299c7 100644
--- a/actioncable/lib/action_cable/subscription_adapter/async.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/async.rb
@@ -1,4 +1,6 @@
-require 'action_cable/subscription_adapter/inline'
+# frozen_string_literal: true
+
+require "action_cable/subscription_adapter/inline"
module ActionCable
module SubscriptionAdapter