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-rw-r--r--activerecord/test/models/edge.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/test/models/edge.rb b/activerecord/test/models/edge.rb
index e61d25c9bc..a04ab103de 100644
--- a/activerecord/test/models/edge.rb
+++ b/activerecord/test/models/edge.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
# This class models an edge in a directed graph.
class Edge < ActiveRecord::Base
belongs_to :source, class_name: "Vertex", foreign_key: "source_id"