#<Herb::Token type="TOKEN_HTML_TAG_START" value="<" range=[0, 1] start=(1:0) end=(1:1)>
#<Herb::Token type="TOKEN_IDENTIFIER" value="h1" range=[1, 3] start=(1:1) end=(1:3)>
#<Herb::Token type="TOKEN_WHITESPACE" value=" " range=[3, 4] start=(1:3) end=(1:4)>
#<Herb::Token type="TOKEN_IDENTIFIER" value="class" range=[4, 9] start=(1:4) end=(1:9)>
#<Herb::Token type="TOKEN_EQUALS" value="=" range=[9, 10] start=(1:9) end=(1:10)>
#<Herb::Token type="TOKEN_QUOTE" value="\"" range=[10, 11] start=(1:10) end=(1:11)>
#<Herb::Token type="TOKEN_IDENTIFIER" value="title" range=[11, 16] start=(1:11) end=(1:16)>
#<Herb::Token type="TOKEN_QUOTE" value="\"" range=[16, 17] start=(1:16) end=(1:17)>
#<Herb::Token type="TOKEN_HTML_TAG_END" value=">" range=[17, 18] start=(1:17) end=(1:18)>
#<Herb::Token type="TOKEN_ERB_START" value="<%=" range=[18, 21] start=(1:18) end=(1:21)>
#<Herb::Token type="TOKEN_ERB_CONTENT" value=" content " range=[21, 30] start=(1:21) end=(1:30)>
#<Herb::Token type="TOKEN_ERB_END" value="%>" range=[30, 32] start=(1:30) end=(1:32)>
#<Herb::Token type="TOKEN_HTML_TAG_START_CLOSE" value="</" range=[32, 34] start=(1:32) end=(1:34)>
#<Herb::Token type="TOKEN_IDENTIFIER" value="h1" range=[34, 36] start=(1:34) end=(1:36)>
#<Herb::Token type="TOKEN_HTML_TAG_END" value=">" range=[36, 37] start=(1:36) end=(1:37)>
#<Herb::Token type="TOKEN_NEWLINE" value="\n" range=[37, 38] start=(1:37) end=(2:0)>
#<Herb::Token type="TOKEN_EOF" value="<EOF>" range=[38, 38] start=(2:0) end=(2:0)>

@ DocumentNode (location: (1:0)-(2:0))
└── children: (2 items)
    ├── @ HTMLElementNode (location: (1:0)-(1:37))
    │   ├── open_tag: 
    │   │   └── @ HTMLOpenTagNode (location: (1:0)-(1:18))
    │   │       ├── tag_opening: "<" (location: (1:0)-(1:1))
    │   │       ├── tag_name: "h1" (location: (1:1)-(1:3))
    │   │       ├── tag_closing: ">" (location: (1:17)-(1:18))
    │   │       ├── children: (1 item)
    │   │       │   └── @ HTMLAttributeNode (location: (1:4)-(1:17))
    │   │       │       ├── name: 
    │   │       │       │   └── @ HTMLAttributeNameNode (location: (1:4)-(1:9))
    │   │       │       │       └── children: (1 item)
    │   │       │       │           └── @ LiteralNode (location: (1:4)-(1:9))
    │   │       │       │               └── content: "class"
    │   │       │       │   
    │   │       │       ├── equals: "=" (location: (1:9)-(1:10))
    │   │       │       └── value: 
    │   │       │           └── @ HTMLAttributeValueNode (location: (1:10)-(1:17))
    │   │       │               ├── open_quote: "\"" (location: (1:10)-(1:11))
    │   │       │               ├── children: (1 item)
    │   │       │               │   └── @ LiteralNode (location: (1:11)-(1:16))
    │   │       │               │       └── content: "title"
    │   │       │               ├── close_quote: "\"" (location: (1:16)-(1:17))
    │   │       │               └── quoted: true
    │   │       └── is_void: false
    │   │   
    │   ├── tag_name: "h1" (location: (1:1)-(1:3))
    │   ├── body: (1 item)
    │   │   └── @ ERBContentNode (location: (1:18)-(1:32))
    │   │       ├── tag_opening: "<%=" (location: (1:18)-(1:21))
    │   │       ├── content: " content " (location: (1:21)-(1:30))
    │   │       ├── tag_closing: "%>" (location: (1:30)-(1:32))
    │   │       ├── parsed: false
    │   │       └── valid: false
    │   ├── close_tag: 
    │   │   └── @ HTMLCloseTagNode (location: (1:32)-(1:37))
    │   │       ├── tag_opening: "</" (location: (1:32)-(1:34))
    │   │       ├── tag_name: "h1" (location: (1:34)-(1:36))
    │   │       ├── children: []
    │   │       └── tag_closing: ">" (location: (1:36)-(1:37))
    │   │   
    │   ├── is_void: false
    │   └── source: "HTML"
    │   
    └── @ HTMLTextNode (location: (1:37)-(2:0))
        └── content: "\n"