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-rw-r--r--test/readline/test_readline_history.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/readline/test_readline_history.rb b/test/readline/test_readline_history.rb
index 4bcd7b3b25..a9a324fb9e 100644
--- a/test/readline/test_readline_history.rb
+++ b/test/readline/test_readline_history.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require "readline"
=begin