{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"assert_eq!(pns(\"%%"}]}
    assert_eq!(pns("%% leading escape"), Some((S::Escape((0, 2)), " leading escape")));
    assert_eq!(pns("*so* has a %% escape"), Some((S::Escape((11, 13)), " escape")));
    assert_eq!(pns("trailing escape %%"), Some((S::Escape((16, 18)), "")));