Enable even more frozen string for lib/gitlab

Enables frozen string for the following:

* lib/gitlab/patch/**/*.rb
* lib/gitlab/popen/**/*.rb
* lib/gitlab/profiler/**/*.rb
* lib/gitlab/project_authorizations/**/*.rb
* lib/gitlab/prometheus/**/*.rb
* lib/gitlab/query_limiting/**/*.rb
* lib/gitlab/quick_actions/**/*.rb
* lib/gitlab/redis/**/*.rb
* lib/gitlab/request_profiler/**/*.rb
* lib/gitlab/search/**/*.rb
* lib/gitlab/sherlock/**/*.rb
* lib/gitlab/sidekiq_middleware/**/*.rb
* lib/gitlab/slash_commands/**/*.rb
* lib/gitlab/sql/**/*.rb
* lib/gitlab/template/**/*.rb
* lib/gitlab/testing/**/*.rb
* lib/gitlab/utils/**/*.rb
* lib/gitlab/webpack/**/*.rb

Partially addresses gitlab-org/gitlab-ce#47424.

2 files changed, 5 insertions, 1 deletions

diff --git a/lib/gitlab/query_limiting/active_support_subscriber.rb b/lib/gitlab/query_limiting/active_support_subscriber.rb
index 3c4ff5d1928..065862174bb 100644
--- a/lib/gitlab/query_limiting/active_support_subscriber.rb
+++ b/lib/gitlab/query_limiting/active_support_subscriber.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module QueryLimiting
     class ActiveSupportSubscriber < ActiveSupport::Subscriber
diff --git a/lib/gitlab/query_limiting/transaction.rb b/lib/gitlab/query_limiting/transaction.rb
index 66d7d9275cf..e8fad067fa6 100644
--- a/lib/gitlab/query_limiting/transaction.rb
+++ b/lib/gitlab/query_limiting/transaction.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module QueryLimiting
     class Transaction
@@ -68,7 +70,7 @@ module Gitlab
 
       def error_message
         header = 'Too many SQL queries were executed'
-        header += " in #{action}" if action
+        header = "#{header} in #{action}" if action
 
         "#{header}: a maximum of #{THRESHOLD} is allowed but #{count} SQL queries were executed"
       end