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-rw-r--r--test/rdoc/test_rdoc_markup_pre_process.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/rdoc/test_rdoc_markup_pre_process.rb b/test/rdoc/test_rdoc_markup_pre_process.rb
index 7cbe29c5a9..8bc474a8fc 100644
--- a/test/rdoc/test_rdoc_markup_pre_process.rb
+++ b/test/rdoc/test_rdoc_markup_pre_process.rb
@@ -1,4 +1,5 @@
# coding: utf-8
+# frozen_string_literal: false
require 'rdoc/test_case'