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-rw-r--r--ext/psych/lib/psych/handlers/document_stream.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/psych/lib/psych/handlers/document_stream.rb b/ext/psych/lib/psych/handlers/document_stream.rb
index e429993..c43b39e 100644
--- a/ext/psych/lib/psych/handlers/document_stream.rb
+++ b/ext/psych/lib/psych/handlers/document_stream.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/tree_builder'
module Psych