syntax_data: {"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let comma = if matches!(last_body.kind, ExprKind::Block { .. })
context_before:                 let last_body = &thir[last.body];
context_after:                     && last.span.eq_ctxt(last_body.span)