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-rw-r--r--lib/rexml/source.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rexml/source.rb b/lib/rexml/source.rb
index 87f7232232..af65cf4751 100644
--- a/lib/rexml/source.rb
+++ b/lib/rexml/source.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
require 'rexml/encoding'
module REXML