Incomplete code groups in manual-visits.mdx

[aalhoura]

The below code groups in manual-vists.mdx are incomplete:

docs/v2/the-basics/manual-visits.mdx

Lines 679 to 708 in a9f110c

	<CodeGroup>
	```js Vue icon="vuejs"
	import { router } from '@inertiajs/vue3'
	router.prependToProp('notifications', (current, props) => {
	return {
	id: Date.now(),
	message: `Hello ${props.user.name}\
	```
	```js React icon="react"
	import { router } from '@inertiajs/react'
	router.prependToProp('notifications', (current, props) => {
	return {
	id: Date.now(),
	message: `Hello ${props.user.name}\
	```
	```js Svelte icon="s"
	import { router } from '@inertiajs/svelte'
	router.prependToProp('notifications', (current, props) => {
	return {
	id: Date.now(),
	message: `Hello ${props.user.name}\
	```
	</CodeGroup>

docs/v2/the-basics/manual-visits.mdx

Lines 1031 to 1055 in a9f110c

	</CodeGroup>
	Returning `false` from the `onBefore()` callback will cause the visit to be cancelled.
	<CodeGroup>
	```js Vue icon="vuejs"
	import { router } from '@inertiajs/vue3'
	router.delete(`/users/${user.id}\
	```
	```js React icon="react"
	import { router } from '@inertiajs/react'
	router.delete(`/users/${user.id}\
	```
	```js Svelte icon="s"
	import { router } from '@inertiajs/svelte'
	router.delete(`/users/${user.id}\
	```
	</CodeGroup>