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-rw-r--r--test/test_unicode_normalize.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/test_unicode_normalize.rb b/test/test_unicode_normalize.rb
index 3dfac8b066..548c8a8cee 100644
--- a/test/test_unicode_normalize.rb
+++ b/test/test_unicode_normalize.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
# Copyright Ayumu Nojima (野島 歩) and Martin J. Dürst (duerst@it.aoyama.ac.jp)