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-rw-r--r--lib/yahns/wbuf_common.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/yahns/wbuf_common.rb b/lib/yahns/wbuf_common.rb
index 8d81c0b..e80068b 100644
--- a/lib/yahns/wbuf_common.rb
+++ b/lib/yahns/wbuf_common.rb
@@ -1,6 +1,7 @@
 # -*- 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
 begin
   raise LoadError, "SENDFILE_BROKEN env set" if ENV["SENDFILE_BROKEN"]
   require 'sendfile'