@ ProgramNode (location: (0...7))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...7))
    └── body: (length: 1)
        └── @ StringNode (location: (0...7))
            ├── opening_loc: (0...3) = "%q("
            ├── content_loc: (3...6) = "\u0001\\'"
            ├── closing_loc: (6...7) = ")"
            └── unescaped: "\u0001'"
