syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"DocTest(ref"}]}
source_snippet:             DocTest(ref path, _) => write!(fmt, "{}", path.display()),
context_before:             Custom(ref s) => write!(fmt, "<{s}>"),
context_after:             InlineAsm(_) => write!(fmt, "<inline asm>"),