doc:   [
    DocGroup({"tag": "h3"}, [
        DocGroup({"client": "i", "tag": "caret"}, []),
        DocChars("p"), DocGroup({"tag": "caret", "client": "j"}, []),
        DocChars("Crbwk0 S3l78t03 Xqmg BT Aq2  B L5G3 7dXqudkV0Ufd2 7c2Re1Nv3W87O0  1sY4ASc44X Tb7k78oV05x287 0KwcPD 6 h0W80 68nnsxSx8sVrD04P   rL330LL2Dql  UV218 HC5 3T ahA")
    ]),
    DocGroup({"tag": "h3"}, [
        DocGroup({"client": "h", "tag": "caret"}, []),
        DocChars(" E"), DocGroup({"client": "c", "tag": "caret"}, [])
    ])
]

a_del: [
    DelWithGroup([
        DelWithGroup([]),
        DelSkip(1), DelWithGroup([]),
        DelSkip(155)
    ]),
    DelWithGroup([
        DelWithGroup([]),
        DelSkip(2), DelWithGroup([])
    ])
]
a_add: [
    AddWithGroup([
        AddWithGroup([]),
        AddSkip(1), AddWithGroup([]),
        AddSkip(155)
    ]),
    AddGroup({"tag": "bullet"}, [
        AddWithGroup([
            AddWithGroup([]),
            AddSkip(2), AddChars("l"), AddWithGroup([])
        ]),
        AddGroup({"tag": "h2"}, [])
    ])
]

b_del: [
    DelGroup([
        DelWithGroup([]),
        DelSkip(1), DelWithGroup([]),
        DelSkip(155)
    ]),
    DelGroup([
        DelSkip(4)
    ])
]
b_add: [
    AddGroup({"tag": "h3"}, [
        AddWithGroup([]),
        AddSkip(1), AddWithGroup([]),
        AddSkip(155), AddChars(" "), AddSkip(4)
    ])
]