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-rw-r--r--test/rdoc/test_rdoc_constant.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/rdoc/test_rdoc_constant.rb b/test/rdoc/test_rdoc_constant.rb
index 171963d8e4..c43aa7dc2b 100644
--- a/test/rdoc/test_rdoc_constant.rb
+++ b/test/rdoc/test_rdoc_constant.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require File.expand_path '../xref_test_case', __FILE__
class TestRDocConstant < XrefTestCase