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-rw-r--r--test/net/ftp/test_buffered_socket.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/test/net/ftp/test_buffered_socket.rb b/test/net/ftp/test_buffered_socket.rb
index 8d7cc2ed52..419d50bb53 100644
--- a/test/net/ftp/test_buffered_socket.rb
+++ b/test/net/ftp/test_buffered_socket.rb
@@ -1,3 +1,6 @@
+#
+# -*- frozen_string_literal: true -*-
+
require "net/ftp"
require "test/unit"
require "ostruct"