{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":".expect(\"UNSTABLE_RUSTDOC_TEST_LINE"}]}
                        .expect("UNSTABLE_RUSTDOC_TEST_LINE needs to be an number");
                    let line = isize::from_str_radix(&line, 10)
                    FileName::doc_test_source_code(PathBuf::from(path), line)