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-rw-r--r--test/psych/test_scalar.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/psych/test_scalar.rb b/test/psych/test_scalar.rb
index e6b76975a6..4353ec33fa 100644
--- a/test/psych/test_scalar.rb
+++ b/test/psych/test_scalar.rb
@@ -1,4 +1,5 @@
# -*- coding: utf-8 -*-
+# frozen_string_literal: false
require_relative 'helper'