syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"assert_eq!(actual.as_str(),"}]}
source_snippet:         assert_eq!(actual.as_str(), after);
context_before:         let actual_positions: Vec<_> = actual_positions.into_iter().map(|nc| nc.pos.0).collect();
context_after:         assert_eq!(actual_positions, expected_positions);