Docs fix: wrong variable used in loop.
@@ -289,7 +289,7 @@ impl<'a> Drop for ParseBuffer<'a> {
/// fn skip_past_next_at(input: ParseStream) -> Result<()> {
/// input.step(|cursor| {
/// let mut rest = *cursor;
-/// while let Some((tt, next)) = cursor.token_tree() {
+/// while let Some((tt, next)) = rest.token_tree() {
/// match tt {
/// TokenTree::Punct(ref punct) if punct.as_char() == '@' => {
/// return Ok(((), next));
