Refactor project_cache_worker_key

app/workers/project_cache_worker.rb

@@ -42,6 +42,6 @@ class ProjectCacheWorker
   end
 
   def project_cache_worker_key(project_id, statistics)
-    (["project_cache_worker", project_id] + statistics.sort).join(":")
+    ["project_cache_worker", project_id, *statistics.sort].join(":")
   end
 end

spec/workers/project_cache_worker_spec.rb

@@ -7,7 +7,7 @@ describe ProjectCacheWorker do
 
   let(:worker) { described_class.new }
   let(:project) { create(:project, :repository) }
-  let(:lease_key) { (["project_cache_worker", project.id] + statistics.sort).join(":") }
+  let(:lease_key) { ["project_cache_worker", project.id, *statistics.sort].join(":") }
   let(:lease_timeout) { ProjectCacheWorker::LEASE_TIMEOUT }
   let(:statistics) { [] }