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-rw-r--r--activesupport/lib/active_support/core_ext/class.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/class.rb b/activesupport/lib/active_support/core_ext/class.rb
index 6a19e862d0..059f0a9097 100644
--- a/activesupport/lib/active_support/core_ext/class.rb
+++ b/activesupport/lib/active_support/core_ext/class.rb
@@ -1,2 +1,3 @@
+# frozen_string_literal: true
require "active_support/core_ext/class/attribute"
require "active_support/core_ext/class/subclasses"