syntax_data: {"ast_node_type":"other","tokens":[{"end":27,"kind":"keyword","start":0,"text":"const"}]}
source_snippet:     const LIMIT: usize = 3;
context_before: ) -> String {
context_after:     let pat_to_str = |pat: &WitnessPat<'p, 'tcx>| cx.print_witness_pat(pat);