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-rw-r--r--test/rexml/test_listener.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/rexml/test_listener.rb b/test/rexml/test_listener.rb
index 309e827880..322d368be8 100644
--- a/test/rexml/test_listener.rb
+++ b/test/rexml/test_listener.rb
@@ -1,4 +1,5 @@
# coding: binary
+# frozen_string_literal: false
require_relative 'rexml_test_utils'