
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "pre"}, [
            DocGroup({"tag": "caret", "client": "c"}, []),
            DocChars("S")
        ]),
        DocGroup({"tag": "pre"}, [
            DocGroup({"tag": "caret", "client": "a"}, [])
        ]),
        DocGroup({"tag": "h2"}, [
            DocChars("S6"), DocGroup({"tag": "caret", "client": "b"}, []),
            DocChars("u 07")
        ])
    ]),
    DocGroup({"tag": "h3"}, [
        DocChars("gwith you?")
    ])
]

a_del: [
    DelGroup([
        DelGroup([
            DelWithGroup([]),
            DelSkip(1)
        ]),
        DelGroup([
            DelGroup([])
        ]),
        DelWithGroup([
            DelChars(2), DelGroup([])
        ])
    ])
]
a_add: [
    AddGroup({"tag": "pre"}, [
        AddWithGroup([]),
        AddSkip(1), AddChars("8")
    ]),
    AddWithGroup([
        AddGroup({"tag": "caret", "client": "a"}, []),
        AddChars("4 "), AddGroup({"client": "b", "tag": "caret"}, [])
    ])
]

b_del: [
    DelWithGroup([
        DelWithGroup([
            DelGroup([]),
            DelChars(1)
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddWithGroup([
            AddChars("N"), AddGroup({"client": "c", "tag": "caret"}, []),
            AddChars("5")
        ])
    ])
]
