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-rw-r--r--app/serializers/cohort_activity_month_entity.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/app/serializers/cohort_activity_month_entity.rb b/app/serializers/cohort_activity_month_entity.rb
index e6788a8b596..cdbc89a2dcd 100644
--- a/app/serializers/cohort_activity_month_entity.rb
+++ b/app/serializers/cohort_activity_month_entity.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
class CohortActivityMonthEntity < Grape::Entity
include ActionView::Helpers::NumberHelper