@ DocumentNode (location: (1:0)-(1:12))
└── children: (1 item)
    └── @ ERBContentNode (location: (1:0)-(1:12))
        ├── tag_opening: "<%=" (location: (1:0)-(1:3))
        ├── content: " hello " (location: (1:3)-(1:10))
        ├── tag_closing: "%>" (location: (1:10)-(1:12))
        ├── parsed: true
        └── valid: true