syntax_data: {"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"assert_eq!(span(start,"}]}
source_snippet:     assert_eq!(span(start, well_after).trim_start(other), Some(span(end, well_after)));
context_before:     assert_eq!(span(mid, well_after).trim_start(other), Some(span(end, well_after)));
context_after:     assert_eq!(span(before, well_after).trim_start(other), Some(span(end, well_after)));