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-rw-r--r--test/ruby/enc/test_iso_8859.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/ruby/enc/test_iso_8859.rb b/test/ruby/enc/test_iso_8859.rb
index 64cc7cd76d..f6b3b3f28b 100644
--- a/test/ruby/enc/test_iso_8859.rb
+++ b/test/ruby/enc/test_iso_8859.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'test/unit'
class TestISO8859 < Test::Unit::TestCase