syntax_data: {"ast_node_type":"other","tokens":[{"end":7,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     ///
context_before:     /// - `C: NonAutoTrait` requires `A: AutoTrait` (non-coinductive cycle, not ok)
context_after:     /// you don't want to cache that `B: AutoTrait` or `A: AutoTrait`