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-rw-r--r--ext/psych/lib/psych/deprecated.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/psych/lib/psych/deprecated.rb b/ext/psych/lib/psych/deprecated.rb
index 8c310b3..165d210 100644
--- a/ext/psych/lib/psych/deprecated.rb
+++ b/ext/psych/lib/psych/deprecated.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'date'
module Psych