
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "pre"}, [
            DocGroup({"client": "d", "tag": "caret"}, []),
            DocChars(" "), DocGroup({"tag": "caret", "client": "b"}, [])
        ]),
        DocGroup({"tag": "pre"}, [
            DocGroup({"tag": "caret", "client": "c"}, [])
        ]),
        DocGroup({"tag": "pre"}, [
            DocChars("YI7 "), DocGroup({"tag": "caret", "client": "a"}, []),
            DocChars("c Iv3")
        ]),
        DocGroup({"tag": "pre"}, [
            DocChars("4 u")
        ]),
        DocGroup({"tag": "p"}, [
            DocChars(" r0o   i WUE1n24")
        ])
    ]),
    DocGroup({"tag": "h1"}, []),
    DocGroup({"tag": "p"}, [
        DocChars("E c3uu8ello worlEat\'s up with you?")
    ])
]

a_del: [
    DelWithGroup([
        DelGroup([
            DelWithGroup([]),
            DelSkip(1), DelGroup([])
        ]),
        DelGroup([
            DelWithGroup([])
        ]),
        DelGroup([
            DelChars(4), DelGroup([]),
            DelSkip(5)
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddGroup({"tag": "pre"}, [
            AddChars("0"), AddGroup({"client": "b", "tag": "caret"}, []),
            AddWithGroup([]),
            AddSkip(1)
        ]),
        AddGroup({"tag": "pre"}, [
            AddWithGroup([]),
            AddChars(" "), AddSkip(1), AddGroup({"tag": "caret", "client": "a"}, []),
            AddChars("T"), AddSkip(4)
        ])
    ])
]

b_del: [
    DelGroup([
        DelGroup([
            DelWithGroup([]),
            DelSkip(1), DelWithGroup([])
        ]),
        DelGroup([
            DelGroup([])
        ]),
        DelGroup([
            DelSkip(4), DelWithGroup([]),
            DelSkip(5)
        ]),
        DelGroup([
            DelSkip(3)
        ]),
        DelWithGroup([])
    ])
]
b_add: [
    AddGroup({"tag": "pre"}, [
        AddWithGroup([]),
        AddSkip(1), AddWithGroup([]),
        AddChars("k"), AddSkip(4), AddWithGroup([]),
        AddSkip(5)
    ]),
    AddGroup({"tag": "h1"}, [
        AddSkip(3)
    ]),
    AddWithGroup([
        AddGroup({"tag": "caret", "client": "c"}, [])
    ])
]
