formaction is missing

[cognominal]

In svelteflix, there is a form with buttons that have a formaction attribute. Such an example should be added in the tutorial
https://github.com/Rich-Harris/svelteflix/blob/69ef00c20730d393a833fe8f6bad60944a1f02eb/src/routes/login/%2Bpage.svelte#L8

       <form method="POST">
		<label>
			email
			<input type="email" name="email" required />
		</label>

		<label>
			password
			<input type="password" name="password" required />
		</label>

		<div class="buttons">
			<button formaction="?/login&redirect_to={data.redirect_to}" type="submit">login</button>
			<button formaction="?/register&redirect_to={data.redirect_to}" type="submit">register</button>
		</div>
	</form>