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-rw-r--r--test/nkf/test_nkf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/nkf/test_nkf.rb b/test/nkf/test_nkf.rb
index 7329e75f12..eb51bf8e7d 100644
--- a/test/nkf/test_nkf.rb
+++ b/test/nkf/test_nkf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
require 'nkf'