File options with extensions not taken into account

[ilandikov]

I tried calling verify() with the code below and approvals 7.2.0

        const { container } = render(componentWithStoreProvider(<DeviceLocation />));
        const htmlOutput = await prettifyHTML(container.innerHTML);

        // Important below
        const options = new Options().forFile().withFileExtention('.html');
        verify(__dirname, 'my_test', htmlOutput, options);

The output is well generated expect the file extention that is .txt, looks like the option is not taken into account.