syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     ///     bar::$f(); // `f`'s `SyntaxContext` is empty.
context_before:     ///     //| and it resolves to `::bar::f`.
context_after:     ///     //^ Since `mod bar` is not outside this expansion, `adjust` does not change `$f`,