metadata: fix typos

test/metadata.test.mjs

@@ -187,10 +187,10 @@ describe.concurrent('Metadata parser', () => {
   });
 
   it('does not load code that looks like a metadata tag', async () => {
-    const tune = `
-const str1 = '@title Awesome song'
-`;
+    const tune = `const str1 = '@title Awesome song'`;
+    // need a lexer to avoid this one, but it's a pretty rare use case:
+    // const tune = `const str1 = '// @title Awesome song'`;
+
     expect(getMetadata(tune)).toStrictEqual({});
   });
-
 });

website/src/pages/learn/metadata.mdx

@@ -64,7 +64,7 @@ Some of them accepts several values, using the comma or new line separator, or d
 */
 ```
 
-You can also add optinal prefixes and use tags where you want:
+You can also add optional prefixes and use tags where you want:
 
 ```js
 /*