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