@ DocumentNode (location: (1:0)-(2:0))
└── children: (2 items)
    ├── @ ERBContentNode (location: (1:0)-(1:17))
    │   ├── tag_opening: "<%" (location: (1:0)-(1:2))
    │   ├── content: " begin; end; " (location: (1:2)-(1:15))
    │   ├── tag_closing: "%>" (location: (1:15)-(1:17))
    │   ├── parsed: true
    │   └── valid: true
    │
    └── @ HTMLTextNode (location: (1:17)-(2:0))
        └── content: "\n"