syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"Custom(ref"}]}
source_snippet:             Custom(ref s) => write!(fmt, "<{s}>"),
context_before:             CliCrateAttr(_) => write!(fmt, "<crate attribute>"),
context_after:             DocTest(ref path, _) => write!(fmt, "{}", path.display()),