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-rw-r--r--test/test_linux_all_tcp_listen_stats.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/test_linux_all_tcp_listen_stats.rb b/test/test_linux_all_tcp_listen_stats.rb
index ef1f943..12a35ba 100644
--- a/test/test_linux_all_tcp_listen_stats.rb
+++ b/test/test_linux_all_tcp_listen_stats.rb
@@ -1,4 +1,5 @@
 # -*- encoding: binary -*-
+# frozen_string_literal: false
 require 'test/unit'
 require 'socket'
 require 'raindrops'