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-rw-r--r--test/-ext-/bignum/test_pack.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/-ext-/bignum/test_pack.rb b/test/-ext-/bignum/test_pack.rb
index f2a3df814e0..04bf3e02de1 100644
--- a/test/-ext-/bignum/test_pack.rb
+++ b/test/-ext-/bignum/test_pack.rb
@@ -1,4 +1,5 @@
# coding: ASCII-8BIT
+# frozen_string_literal: false
require 'test/unit'
require "-test-/bignum"