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-rw-r--r--lib/arel/tree_manager.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/arel/tree_manager.rb b/lib/arel/tree_manager.rb
index 5278ab06a1..cc3f1eeee4 100644
--- a/lib/arel/tree_manager.rb
+++ b/lib/arel/tree_manager.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require 'arel/collectors/sql_string'
module Arel