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-rw-r--r--ext/psych/lib/psych.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/psych/lib/psych.rb b/ext/psych/lib/psych.rb
index 8ba6ef6cc7..83b5dbba29 100644
--- a/ext/psych/lib/psych.rb
+++ b/ext/psych/lib/psych.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
case RUBY_ENGINE
when 'jruby'
require 'psych_jars'