Simple spec fixes

lib/backup/manager.rb

@@ -125,7 +125,6 @@ module Backup
       end
     end
 
-    # rubocop: disable Cop/AvoidReturnFromBlocks
     def unpack
       Dir.chdir(backup_path) do
         if ENV['BACKUP'].present?
@@ -169,7 +168,6 @@ module Backup
       end
       true
     end
-    # rubocop: enable Cop/AvoidReturnFromBlocks
 
     def tar_version
       tar_version, _ = Gitlab::Popen.popen(%w(tar --version))

spec/tasks/gitlab/backup_rake_spec.rb

@@ -241,7 +241,7 @@ describe 'gitlab:app namespace rake task' do
         )
 
         expect(exit_status).to eq(0)
-        expect(tar_contents).to match('db/')
+        expect(tar_contents).to match('db')
         expect(tar_contents).to match('uploads.tar.gz')
         expect(tar_contents).to match('repositories/')
         expect(tar_contents).to match('builds.tar.gz')