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-rw-r--r--actionmailer/lib/action_mailer/railtie.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionmailer/lib/action_mailer/railtie.rb b/actionmailer/lib/action_mailer/railtie.rb
index 913df8cf93..65a23e1ae7 100644
--- a/actionmailer/lib/action_mailer/railtie.rb
+++ b/actionmailer/lib/action_mailer/railtie.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "active_job/railtie"
require "action_mailer"
require "rails"