Fix spec/services/git_push_service_spec.rb

Signed-off-by: Rémy Coutable <remy@rymai.me>

spec/services/git_push_service_spec.rb

@@ -146,14 +146,14 @@ describe GitPushService, services: true do
   end
 
   describe "Pipelines" do
-    subject { execute_service(project, user, @oldrev, @newrev, @ref) }
+    subject { execute_service(project, user, oldrev, newrev, ref) }
 
     before do
       stub_ci_pipeline_to_return_yaml_file
     end
 
     it "creates a new pipeline" do
-      expect{ subject }.to change{ Ci::Pipeline.count }
+      expect{ subject }.to change { Ci::Pipeline.count }
       expect(Ci::Pipeline.last).to be_push
     end
   end