Enable even more frozen string for lib/gitlab

Enables frozen string for the following:

* lib/gitlab/hook_data/**/*.rb
* lib/gitlab/i18n/**/*.rb
* lib/gitlab/import/**/*.rb
* lib/gitlab/import_export/**/*.rb
* lib/gitlab/kubernetes/**/*.rb
* lib/gitlab/legacy_github_import/**/*.rb
* lib/gitlab/manifest_import/**/*.rb
* lib/gitlab/metrics/**/*.rb
* lib/gitlab/middleware/**/*.rb

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

14 files changed, 28 insertions, 0 deletions

diff --git a/lib/gitlab/legacy_github_import/base_formatter.rb b/lib/gitlab/legacy_github_import/base_formatter.rb
index 11d1300e51e..0b19cf742ed 100644
--- a/lib/gitlab/legacy_github_import/base_formatter.rb
+++ b/lib/gitlab/legacy_github_import/base_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class BaseFormatter
diff --git a/lib/gitlab/legacy_github_import/branch_formatter.rb b/lib/gitlab/legacy_github_import/branch_formatter.rb
index 80fe1d67209..1177751457f 100644
--- a/lib/gitlab/legacy_github_import/branch_formatter.rb
+++ b/lib/gitlab/legacy_github_import/branch_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class BranchFormatter < BaseFormatter
diff --git a/lib/gitlab/legacy_github_import/client.rb b/lib/gitlab/legacy_github_import/client.rb
index d8ed0ebca9d..bc952147667 100644
--- a/lib/gitlab/legacy_github_import/client.rb
+++ b/lib/gitlab/legacy_github_import/client.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class Client
diff --git a/lib/gitlab/legacy_github_import/comment_formatter.rb b/lib/gitlab/legacy_github_import/comment_formatter.rb
index d2c7a8ae9f4..d83cc4f6b3c 100644
--- a/lib/gitlab/legacy_github_import/comment_formatter.rb
+++ b/lib/gitlab/legacy_github_import/comment_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class CommentFormatter < BaseFormatter
diff --git a/lib/gitlab/legacy_github_import/importer.rb b/lib/gitlab/legacy_github_import/importer.rb
index c5bde681365..43695451b87 100644
--- a/lib/gitlab/legacy_github_import/importer.rb
+++ b/lib/gitlab/legacy_github_import/importer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class Importer
diff --git a/lib/gitlab/legacy_github_import/issuable_formatter.rb b/lib/gitlab/legacy_github_import/issuable_formatter.rb
index 7db4a54267e..1a0aefbbd62 100644
--- a/lib/gitlab/legacy_github_import/issuable_formatter.rb
+++ b/lib/gitlab/legacy_github_import/issuable_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class IssuableFormatter < BaseFormatter
diff --git a/lib/gitlab/legacy_github_import/issue_formatter.rb b/lib/gitlab/legacy_github_import/issue_formatter.rb
index 4c8825ccf19..2f46e2e30d1 100644
--- a/lib/gitlab/legacy_github_import/issue_formatter.rb
+++ b/lib/gitlab/legacy_github_import/issue_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class IssueFormatter < IssuableFormatter
diff --git a/lib/gitlab/legacy_github_import/label_formatter.rb b/lib/gitlab/legacy_github_import/label_formatter.rb
index e9663650903..89200e794d8 100644
--- a/lib/gitlab/legacy_github_import/label_formatter.rb
+++ b/lib/gitlab/legacy_github_import/label_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class LabelFormatter < BaseFormatter
diff --git a/lib/gitlab/legacy_github_import/milestone_formatter.rb b/lib/gitlab/legacy_github_import/milestone_formatter.rb
index a565294384d..2fe1b4258d3 100644
--- a/lib/gitlab/legacy_github_import/milestone_formatter.rb
+++ b/lib/gitlab/legacy_github_import/milestone_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class MilestoneFormatter < BaseFormatter
diff --git a/lib/gitlab/legacy_github_import/project_creator.rb b/lib/gitlab/legacy_github_import/project_creator.rb
index 5e96eb16754..ca1a1b8e9bd 100644
--- a/lib/gitlab/legacy_github_import/project_creator.rb
+++ b/lib/gitlab/legacy_github_import/project_creator.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class ProjectCreator
diff --git a/lib/gitlab/legacy_github_import/pull_request_formatter.rb b/lib/gitlab/legacy_github_import/pull_request_formatter.rb
index 94c2e99066a..5b847f13d4a 100644
--- a/lib/gitlab/legacy_github_import/pull_request_formatter.rb
+++ b/lib/gitlab/legacy_github_import/pull_request_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class PullRequestFormatter < IssuableFormatter
diff --git a/lib/gitlab/legacy_github_import/release_formatter.rb b/lib/gitlab/legacy_github_import/release_formatter.rb
index 3ed9d4f76da..8c0c17780ca 100644
--- a/lib/gitlab/legacy_github_import/release_formatter.rb
+++ b/lib/gitlab/legacy_github_import/release_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class ReleaseFormatter < BaseFormatter
diff --git a/lib/gitlab/legacy_github_import/user_formatter.rb b/lib/gitlab/legacy_github_import/user_formatter.rb
index 3794380e2d0..ec0e221b1ff 100644
--- a/lib/gitlab/legacy_github_import/user_formatter.rb
+++ b/lib/gitlab/legacy_github_import/user_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class UserFormatter
diff --git a/lib/gitlab/legacy_github_import/wiki_formatter.rb b/lib/gitlab/legacy_github_import/wiki_formatter.rb
index 27f45875c7c..ea52be5ee0f 100644
--- a/lib/gitlab/legacy_github_import/wiki_formatter.rb
+++ b/lib/gitlab/legacy_github_import/wiki_formatter.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module LegacyGithubImport
     class WikiFormatter