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-rw-r--r--actionpack/lib/action_dispatch/middleware/debug_locks.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/debug_locks.rb b/actionpack/lib/action_dispatch/middleware/debug_locks.rb
index 74b952528e..600b0a51b1 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_locks.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_locks.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
module ActionDispatch
# This middleware can be used to diagnose deadlocks in the autoload interlock.
#