
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "pre"}, [
            DocChars("W W "), DocGroup({"client": "e", "tag": "caret"}, []),
            DocChars("26BB")
        ])
    ]),
    DocGroup({"tag": "h3"}, [
        DocGroup({"tag": "caret", "client": "a"}, []),
        DocGroup({"tag": "caret", "client": "c"}, []),
        DocChars("k54A")
    ]),
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h1"}, [
            DocChars("yaI")
        ]),
        DocGroup({"tag": "h2"}, [
            DocGroup({"client": "b", "tag": "caret"}, []),
            DocChars("Qp")
        ]),
        DocGroup({"tag": "p"}, [
            DocGroup({"tag": "caret", "client": "d"}, []),
            DocChars(" L7 44IXo wo!What\'s up with you?")
        ])
    ])
]

a_del: [
    DelWithGroup([
        DelWithGroup([
            DelSkip(4), DelWithGroup([]),
            DelSkip(2), DelChars(2)
        ])
    ]),
    DelWithGroup([
        DelGroup([]),
        DelGroup([]),
        DelSkip(4)
    ]),
    DelWithGroup([
        DelWithGroup([
            DelSkip(2), DelChars(1)
        ]),
        DelWithGroup([
            DelGroup([])
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddWithGroup([
            AddGroup({"client": "c", "tag": "caret"}, []),
            AddSkip(4), AddWithGroup([]),
            AddSkip(2), AddChars(" "), AddGroup({"client": "a", "tag": "caret"}, [])
        ])
    ]),
    AddWithGroup([
        AddChars("0f"), AddSkip(4)
    ]),
    AddWithGroup([
        AddWithGroup([
            AddSkip(2), AddChars(" "), AddGroup({"client": "b", "tag": "caret"}, []),
            AddChars("X")
        ]),
        AddWithGroup([])
    ])
]

b_del: [
    DelWithGroup([
        DelWithGroup([
            DelSkip(4), DelWithGroup([]),
            DelSkip(4)
        ])
    ]),
    DelWithGroup([
        DelWithGroup([]),
        DelWithGroup([]),
        DelSkip(4)
    ]),
    DelGroup([
        DelWithGroup([
            DelSkip(3)
        ]),
        DelWithGroup([
            DelWithGroup([]),
            DelSkip(2)
        ]),
        DelWithGroup([
            DelGroup([]),
            DelChars(1)
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddWithGroup([
            AddSkip(4), AddWithGroup([]),
            AddSkip(4)
        ])
    ]),
    AddWithGroup([
        AddWithGroup([]),
        AddWithGroup([]),
        AddSkip(4)
    ]),
    AddWithGroup([
        AddSkip(3)
    ]),
    AddWithGroup([
        AddWithGroup([]),
        AddSkip(2)
    ]),
    AddWithGroup([
        AddGroup({"tag": "caret", "client": "d"}, [])
    ])
]
