docs(codegen): fix example for CodeBuffer::print_ascii_bytes (#6535)

Fix example and add a test.

crates/oxc_codegen/src/code_buffer.rs

@@ -320,7 +320,7 @@ impl CodeBuffer {
     /// use oxc_codegen::CodeBuffer;
     /// let mut code = CodeBuffer::new();
     ///
-    /// code.print_ascii([b'f', b'o', b'o'].into_iter());
+    /// code.print_ascii_bytes([b'f', b'o', b'o']);
     /// assert_eq!(String::from(code), "foo");
     /// ```
     pub fn print_ascii_bytes<I>(&mut self, bytes: I)
@@ -497,6 +497,17 @@ mod test {
         assert_eq!(String::from(code), "foo");
     }
 
+    #[test]
+    #[allow(clippy::byte_char_slices)]
+    fn print_ascii_bytes() {
+        let mut code = CodeBuffer::new();
+        code.print_ascii_bytes([b'f', b'o', b'o']);
+
+        assert_eq!(code.len(), 3);
+        assert_eq!(code.as_bytes(), &[b'f', b'o', b'o']);
+        assert_eq!(String::from(code), "foo");
+    }
+
     #[test]
     fn peek_nth_char_back() {
         let mut code = CodeBuffer::new();