syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"\"present"}]}
source_snippet:         "present the input source, unstable (and less-pretty) variants;
context_before:     unpretty: Option<String> = (None, parse_unpretty, [UNTRACKED],
context_after:         `normal`, `identified`,