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-rw-r--r--lib/rubygems/syck_hack.rb1
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diff --git a/lib/rubygems/syck_hack.rb b/lib/rubygems/syck_hack.rb
index 92179abb53..0f49793ea1 100644
--- a/lib/rubygems/syck_hack.rb
+++ b/lib/rubygems/syck_hack.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# :stopdoc:
# Hack to handle syck's DefaultKey bug