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-rw-r--r--activesupport/lib/active_support/message_encryptor.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/message_encryptor.rb b/activesupport/lib/active_support/message_encryptor.rb
index e576766c64..c03d8a22d5 100644
--- a/activesupport/lib/active_support/message_encryptor.rb
+++ b/activesupport/lib/active_support/message_encryptor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "openssl"
require "base64"
require "active_support/core_ext/array/extract_options"