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-rw-r--r--activerecord/lib/active_record/attribute_set/yaml_encoder.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/attribute_set/yaml_encoder.rb b/activerecord/lib/active_record/attribute_set/yaml_encoder.rb
index 899de14792..9254ce16ab 100644
--- a/activerecord/lib/active_record/attribute_set/yaml_encoder.rb
+++ b/activerecord/lib/active_record/attribute_set/yaml_encoder.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
module ActiveRecord
class AttributeSet
# Attempts to do more intelligent YAML dumping of an