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-rw-r--r--lib/yahns/server_mp.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/yahns/server_mp.rb b/lib/yahns/server_mp.rb
index 6b5f4b6..f583812 100644
--- a/lib/yahns/server_mp.rb
+++ b/lib/yahns/server_mp.rb
@@ -1,6 +1,8 @@
 # -*- encoding: binary -*-
 # Copyright (C) 2013-2015 all contributors <yahns-public@yhbt.net>
 # License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
+# frozen_string_literal: true
+
 module Yahns::ServerMP # :nodoc:
   EXIT_SIGS = [ :QUIT, :TERM, :INT ]