syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                         // This is subtle, joining an empty path onto e.g. `foo/bar` will
context_before:                     let remapped = if rest.as_os_str().is_empty() {
context_after:                         // result in `foo/bar/`, that is, there'll be an additional directory