The source project of this merge request has been removed.
Enable some frozen string in ee/app
Enables frozen string for the following:
ee/app/policies/**/*.rb
ee/app/presenters/**/*.rb
ee/app/serializers/**/*.rb
ee/app/services/**/*.rb
ee/app/uploaders/**/*.rb
ee/app/validators/**/*.rb
ee/app/workers/**/*.rb
What are the relevant issue numbers?
Partially addresses gitlab-org/gitlab-ce#47424.