refactor the condition to before block.

spec/requests/api/merge_requests_spec.rb

@@ -1637,8 +1637,11 @@ describe API::MergeRequests do
     context "performing a ff-merge with squash" do
       let(:merge_request) { create(:merge_request, :rebased, source_project: project, squash: true) }
 
-      it "records the squash commit SHA and returns it in the response" do
+      before do
         project.update(merge_requests_ff_only_enabled: true)
+      end
+
+      it "records the squash commit SHA and returns it in the response" do
         put api("/projects/#{project.id}/merge_requests/#{merge_request.iid}/merge", user)
 
         expect(response).to have_gitlab_http_status(200)