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-rw-r--r--t/listener_names.ru1
1 files changed, 1 insertions, 0 deletions
diff --git a/t/listener_names.ru b/t/listener_names.ru
index edb4e6a..f52c59b 100644
--- a/t/listener_names.ru
+++ b/t/listener_names.ru
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 use Rack::ContentLength
 use Rack::ContentType, "text/plain"
 names = Unicorn.listener_names.inspect # rely on preload_app=true