{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"assert_eq!(pns(\"*so*"}]}
    assert_eq!(pns("*so* has a $$ escape"), Some((S::Escape((11, 13)), " escape")));
    assert_eq!(pns("has no escapes, either $"), None);
    assert_eq!(pns("$$ leading escape"), Some((S::Escape((0, 2)), " leading escape")));