docs: add parenthesis back to regex literal example (#9027)

* fix: added parenthesis to literal notation example

* add prettier-ignore

---------

Co-authored-by: gtmnayan <[email protected]>

Author: KaiErikNiermann

documentation/docs/02-template-syntax/02-basic-markup.md

@@ -113,11 +113,12 @@ Text can also contain JavaScript expressions:
 
 > If you're using a regular expression (`RegExp`) [literal notation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#literal_notation_and_constructor), you'll need to wrap it in parentheses.
 
+<!-- prettier-ignore -->
 ```svelte
 <h1>Hello {name}!</h1>
 <p>{a} + {b} = {a + b}.</p>
 
-<div>{/^[A-Za-z ]+$/.test(value) ? x : y}</div>
+<div>{(/^[A-Za-z ]+$/).test(value) ? x : y}</div>
 ```
 
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