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-rw-r--r--lib/psych/visitors.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/psych/visitors.rb b/lib/psych/visitors.rb
index cc98b10..5dee4eb 100644
--- a/lib/psych/visitors.rb
+++ b/lib/psych/visitors.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/visitors/visitor'
require 'psych/visitors/to_ruby'
require 'psych/visitors/emitter'