
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h3"}, [
            DocChars("h"), DocGroup({"client": "a", "tag": "caret"}, [])
        ]),
        DocGroup({"tag": "p"}, [
            DocChars("S  01")
        ]),
        DocGroup({"tag": "h3"}, [
            DocChars("q  2 ")
        ])
    ]),
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h1"}, [
            DocChars("0"), DocGroup({"client": "d", "tag": "caret"}, [])
        ]),
        DocGroup({"tag": "h1"}, [
            DocGroup({"tag": "caret", "client": "b"}, []),
            DocChars("Tg0O  pe")
        ])
    ]),
    DocGroup({"tag": "h3"}, [
        DocChars(" 1M "), DocGroup({"client": "e", "tag": "caret"}, []),
        DocChars("Re")
    ]),
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "p"}, [
            DocChars("U"), DocGroup({"tag": "caret", "client": "c"}, []),
            DocChars("w f05at\'s up with you?")
        ])
    ])
]

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

b_del: [
    DelGroup([
        DelGroup([
            DelSkip(1), DelWithGroup([])
        ]),
        DelGroup([
            DelSkip(5)
        ]),
        DelWithGroup([
            DelSkip(5)
        ])
    ]),
    DelWithGroup([
        DelGroup([
            DelChars(1), DelWithGroup([])
        ]),
        DelGroup([
            DelGroup([]),
            DelSkip(8)
        ])
    ])
]
b_add: [
    AddGroup({"tag": "h3"}, [
        AddSkip(1), AddWithGroup([]),
        AddGroup({"tag": "caret", "client": "b"}, []),
        AddSkip(5)
    ]),
    AddWithGroup([
        AddChars(" "), AddSkip(5)
    ]),
    AddWithGroup([
        AddGroup({"tag": "h1"}, [
            AddWithGroup([]),
            AddChars(" l"), AddSkip(8)
        ])
    ])
]
