fix: do not wrongly suggest that a lang attribute is missing when finding comments (#1166)

Author: maxlath

.changeset/fancy-guests-appear.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/vite-plugin-svelte': patch
+---
+
+skip comment blocks when reporting compiler errors that might be caused by a preprocessor issue

packages/vite-plugin-svelte/src/utils/error.js

@@ -132,6 +132,9 @@ export function enhanceCompileError(err, originalCode, preprocessors) {
 
 		let m;
 		while ((m = styleRe.exec(originalCode))) {
+			if (m[0]?.startsWith('<!--')) {
+				continue;
+			}
 			// Warn missing lang attribute
 			if (!m[1]?.includes('lang=')) {
 				additionalMessages.push('Did you forget to add a lang attribute to your style tag?');