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-rw-r--r--test/-ext-/test_recursion.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/-ext-/test_recursion.rb b/test/-ext-/test_recursion.rb
index 06faf6dc7a..db7a853988 100644
--- a/test/-ext-/test_recursion.rb
+++ b/test/-ext-/test_recursion.rb
@@ -1,4 +1,5 @@
# -*- coding: us-ascii -*-
+# frozen_string_literal: false
require 'test/unit'
class TestRecursion < Test::Unit::TestCase