syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:             for p in iter.by_ref().take(CAP_COVERED_BY_MANY) {
context_before:             let mut multispan = MultiSpan::from_span(pat_span);
context_after:                 multispan.push_span_label(