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-rw-r--r--app/models/concerns/subscribable.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/app/models/concerns/subscribable.rb b/app/models/concerns/subscribable.rb
index f478c8ede18..1d0a61364b0 100644
--- a/app/models/concerns/subscribable.rb
+++ b/app/models/concerns/subscribable.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
# == Subscribable concern
#
# Users can subscribe to these models.