syntax_data: {"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // but `candidate` itself has not. If the last candidate has more match pairs,
context_before:                 // Note that the subcandidates have been added to `expanded_candidates`,
context_after:                 // they are handled separately by `test_remaining_match_pairs_after_or`.