Enable even more frozen string in lib/gitlabrepo-forks/gitlab-ce-frozen-string-lib-gitlab-even-more

Enables frozen string for the following:

* lib/gitlab/fogbugz_import/**/*.rb
* lib/gitlab/gfm/**/*.rb
* lib/gitlab/git/**/*.rb
* lib/gitlab/gitaly_client/**/*.rb
* lib/gitlab/gitlab_import/**/*.rb
* lib/gitlab/google_code_import/**/*.rb
* lib/gitlab/gpg/**/*.rb
* lib/gitlab/grape_logging/**/*.rb
* lib/gitlab/graphql/**/*.rb
* lib/gitlab/graphs/**/*.rb
* lib/gitlab/hashed_storage/**/*.rb
* lib/gitlab/health_checks/**/*.rb

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

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/gitlab/gitaly_client/repository_service.rb b/lib/gitlab/gitaly_client/repository_service.rb
index d7b36946b65..f968ebc2cbf 100644
--- a/lib/gitlab/gitaly_client/repository_service.rb
+++ b/lib/gitlab/gitaly_client/repository_service.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module GitalyClient
     class RepositoryService
@@ -56,9 +58,9 @@ module Gitlab
         request = Gitaly::GetInfoAttributesRequest.new(repository: @gitaly_repo)
 
         response = GitalyClient.call(@storage, :repository_service, :get_info_attributes, request, timeout: GitalyClient.fast_timeout)
-        response.each_with_object("") do |message, attributes|
+        response.each_with_object([]) do |message, attributes|
           attributes << message.attributes
-        end
+        end.join
       end
 
       def fetch_remote(remote, ssh_auth:, forced:, no_tags:, timeout:, prune: true)