fix comment regression + add test for it

src/modules/markup.ts

@@ -3,7 +3,7 @@ import type { Transformer, Preprocessor } from '../types';
 /** Create a tag matching regexp. */
 export function createTagRegex(tagName: string, flags?: string): RegExp {
   return new RegExp(
-    `<!--[^]*?-->|<${tagName}(\\s[^]*?)?(?:>([^]*?)<\\/${tagName}>|\\/>)`,
+    `/<!--[^]*?-->|<${tagName}(\\s[^]*?)?(?:>([^]*?)<\\/${tagName}>|\\/>)`,
     flags,
   );
 }

test/fixtures/TypeScriptImports.svelte

@@ -116,4 +116,6 @@
 
     {@html val}
     {@debug val, inputVal}
-</div>
+</div>
+
+<!-- Some comment -->

test/transformers/typescript.test.ts

@@ -120,6 +120,7 @@ describe('transformer - typescript', () => {
 
       const { code } = await preprocess(tpl, opts);
 
+      // Test that imports are properly preserved
       expect(code).toContain(`import { fly } from "svelte/transition"`);
       expect(code).toContain(`import { flip } from "svelte/animate"`);
       expect(code).toContain(`import Nested from "./Nested.svelte"`);
@@ -131,6 +132,8 @@ describe('transformer - typescript', () => {
       expect(code).toContain(
         `import { onlyUsedInModuleScript } from "./modulescript";`,
       );
+      // Test that comments are properly preserved
+      expect(code).toContain('<!-- Some comment -->');
     });
 
     it('should deal with empty transpilation result', async () => {