syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// in match tree lowering.
context_before:     /// Note that this takes place _after_ the subcandidates have participated
context_after:     fn merge_trivial_subcandidates(&mut self, candidate: &mut Candidate<'tcx>) {