syntax_data: {"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"Some(old)"}]}
source_snippet:             Some(old) => {
context_before:             None => writeln!(f, "{}: {:?}", place_str, new.get(value))?,
context_after:                 if new.get(value) != old.get(value) {