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-rw-r--r--activesupport/lib/active_support/option_merger.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/option_merger.rb b/activesupport/lib/active_support/option_merger.rb
index 9edb0e6cd8..5788332349 100644
--- a/activesupport/lib/active_support/option_merger.rb
+++ b/activesupport/lib/active_support/option_merger.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require_relative "core_ext/hash/deep_merge"
module ActiveSupport