syntax_data: {"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // to only the numeric bits.
context_before:     // version strings like '3.8.0svn', so limit what we try to parse
context_after:     let re = Regex::new(r"^(?P<major>\d+)\.(?P<minor>\d+)(?:\.(?P<patch>\d+))??").unwrap();