https://git.ruby-lang.org/ruby.git/commit/?id=1dd94dfba3

From 1dd94dfba3ed3ffd087d1ba93154cb922033a37c Mon Sep 17 00:00:00 2001
From: NAKAMURA Usaku <usa@r...>
Date: Tue, 30 Apr 2019 21:51:03 +0900
Subject: Must use IO::NULL instead of platform dependent filename


diff --git a/tool/redmine-backporter.rb b/tool/redmine-backporter.rb
index 3c2d46d..1ac001b 100755
--- a/tool/redmine-backporter.rb
+++ b/tool/redmine-backporter.rb
@@ -436,7 +436,7 @@ eom https://github.com/ruby/ruby/blob/trunk/tool/redmine-backporter.rb#L436
       next
     end
 
-    if system("svn info #{RUBY_REPO_PATH&.shellescape} > /dev/null 2>&1") # SVN
+    if system("svn info #{RUBY_REPO_PATH&.shellescape} > #{IO::NULL} 2>&1") # SVN
       if log = find_svn_log("##@issue]") && /revision="(?<rev>\d+)/ =~ log
         rev = "r#{rev}"
       end
-- 
cgit v0.10.2


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