
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "pre"}, []),
        DocGroup({"tag": "p"}, [
            DocChars("U "), DocGroup({"tag": "caret", "client": "b"}, []),
            DocGroup({"tag": "caret", "client": "d"}, []),
            DocChars("S")
        ]),
        DocGroup({"tag": "p"}, [
            DocGroup({"client": "c", "tag": "caret"}, []),
            DocChars("  8h")
        ]),
        DocGroup({"tag": "h1"}, [
            DocGroup({"tag": "caret", "client": "a"}, []),
            DocChars("Aello world!")
        ])
    ]),
    DocGroup({"tag": "p"}, [
        DocChars("Xa6t\'s up with you?")
    ])
]

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

b_del: [
    DelWithGroup([
        DelWithGroup([]),
        DelGroup([
            DelSkip(2), DelWithGroup([]),
            DelWithGroup([]),
            DelSkip(1)
        ]),
        DelGroup([
            DelSkip(5)
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddWithGroup([]),
        AddGroup({"tag": "p"}, [
            AddSkip(2), AddWithGroup([]),
            AddWithGroup([]),
            AddSkip(1), AddChars("6"), AddSkip(5)
        ])
    ])
]
