{"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"let"}]}
        let b: &[_] = &[Symbol::intern(" doc comment"), Symbol::intern(" line 2")];
        let docs = item.attrs.iter().filter_map(|at| at.doc_str()).collect::<Vec<_>>();
        assert_eq!(&docs[..], b);