{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"if"}]}
            if let Some(misspelled_kw) = find_similar_kw(prev_ident, &all_keywords) {
            // false positives like suggesting keyword `for` for `extern crate foo {}`.
                err.subdiagnostic(misspelled_kw);