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-rw-r--r--lib/rack/logger.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/rack/logger.rb b/lib/rack/logger.rb
index 01fc321c..6c4bede0 100644
--- a/lib/rack/logger.rb
+++ b/lib/rack/logger.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'logger'
 
 module Rack