Sync kit docs (#1551)

sync kit docs

Co-authored-by: svelte-docs-bot[bot] <196124396+svelte-docs-bot[bot]@users.noreply.github.com>

Author: github-actions[bot]

apps/svelte.dev/content/docs/kit/20-core-concepts/30-form-actions.md

@@ -441,7 +441,7 @@ We can also implement progressive enhancement ourselves, without `use:enhance`,
 	/** @param {SubmitEvent & { currentTarget: EventTarget & HTMLFormElement}} event */
 	async function handleSubmit(event) {
 		event.preventDefault();
-		const data = new FormData(event.currentTarget);
+		const data = new FormData(event.currentTarget, event.submitter);
 
 		const response = await fetch(event.currentTarget.action, {
 			method: 'POST',

apps/svelte.dev/content/docs/kit/20-core-concepts/60-remote-functions.md

@@ -428,7 +428,7 @@ For client-side validation, you can specify a _preflight_ schema which will popu
 
 	const schema = v.object({
 		title: v.pipe(v.string(), v.nonEmpty()),
-		content:v.pipe(v.string(), v.nonEmpty())
+		content: v.pipe(v.string(), v.nonEmpty())
 	});
 </script>
 

apps/svelte.dev/content/docs/kit/98-reference/10-@sveltejs-kit.md

@@ -2352,6 +2352,8 @@ type RemoteForm<
 	/** Validate the form contents programmatically */
 	validate(options?: {
 		includeUntouched?: boolean;
+		/** Perform validation as if the form was submitted by the given button. */
+		submitter?: HTMLButtonElement | HTMLInputElement;
 	}): Promise<void>;
 	/** The result of the form submission */
 	get result(): Output | undefined;