Apply suggestions from code review

Author: dummdidumm

packages/svelte/src/internal/client/constants.js

@@ -68,6 +68,7 @@ export const STALE_REACTION = new (class StaleReactionError extends Error {
 })();
 
 export const IS_XHTML =
+	// We gotta write it like this because after downleveling the pure comment may end up in the wrong location
 	!!globalThis.document?.contentType &&
 	/* @__PURE__ */ globalThis.document.contentType.includes('xml');
 export const ELEMENT_NODE = 1;

packages/svelte/src/internal/client/dom/reconciler.js

@@ -3,6 +3,7 @@
 import { create_element } from './operations.js';
 
 const policy =
+	// We gotta write it like this because after downleveling the pure comment may end up in the wrong location
 	globalThis?.window?.trustedTypes &&
 	/* @__PURE__ */ globalThis.window.trustedTypes.createPolicy('svelte-trusted-html', {
 		/** @param {string} html */