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-rw-r--r--activerecord/lib/active_record/reflection.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb
index 1026e20f79..efe56454d0 100644
--- a/activerecord/lib/active_record/reflection.rb
+++ b/activerecord/lib/active_record/reflection.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "thread"
require "active_support/core_ext/string/filters"
require "active_support/deprecation"