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-rw-r--r--lib/gitlab/middleware/rails_queue_duration.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/gitlab/middleware/rails_queue_duration.rb b/lib/gitlab/middleware/rails_queue_duration.rb
index bc70b2459ef..96c6a0a7d28 100644
--- a/lib/gitlab/middleware/rails_queue_duration.rb
+++ b/lib/gitlab/middleware/rails_queue_duration.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
# This Rack middleware is intended to measure the latency between
# gitlab-workhorse forwarding a request to the Rails application and the
# time this middleware is reached.