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-rw-r--r--railties/lib/rails/railtie/configurable.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/railties/lib/rails/railtie/configurable.rb b/railties/lib/rails/railtie/configurable.rb
index 2a8295426e..7f42fae10a 100644
--- a/railties/lib/rails/railtie/configurable.rb
+++ b/railties/lib/rails/railtie/configurable.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "active_support/concern"
module Rails