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-rw-r--r--lib/rexml/rexml.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rexml/rexml.rb b/lib/rexml/rexml.rb
index f89951171a..fbc0d339d8 100644
--- a/lib/rexml/rexml.rb
+++ b/lib/rexml/rexml.rb
@@ -1,4 +1,5 @@
# -*- encoding: utf-8 -*-
+# frozen_string_literal: false
# REXML is an XML toolkit for Ruby[http://www.ruby-lang.org], in Ruby.
#
# REXML is a _pure_ Ruby, XML 1.0 conforming,