[
  {"type":"LiteralStringAffix","value":"f"},
  {"type":"LiteralStringSingle","value":"'"},
  {"type":"LiteralStringInterpol","value":"{"},
  {"type":"Name","value":"foo"},
  {"type":"LiteralStringInterpol","value":"=!s}"},
  {"type":"LiteralStringSingle","value":"'"},
  {"type":"Text","value":"\n"}
]