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-rw-r--r--lib/psych/set.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/psych/set.rb b/lib/psych/set.rb
index 6793a8e..f35be15 100644
--- a/lib/psych/set.rb
+++ b/lib/psych/set.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module Psych
class Set < ::Hash
end