
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h1"}, [
            DocGroup({"tag": "caret", "client": "b"}, []),
            DocChars("U7")
        ]),
        DocGroup({"tag": "h1"}, [
            DocChars("J"), DocGroup({"client": "c", "tag": "caret"}, []),
            DocChars("P5kbo  O m4C")
        ]),
        DocGroup({"tag": "h1"}, [
            DocGroup({"client": "a", "tag": "caret"}, []),
            DocChars("gUD CV t7HTs up with you?")
        ])
    ])
]

a_del: [
    DelGroup([
        DelGroup([
            DelWithGroup([]),
            DelSkip(1), DelChars(1)
        ]),
        DelGroup([
            DelSkip(1), DelWithGroup([]),
            DelSkip(12)
        ]),
        DelWithGroup([
            DelGroup([])
        ])
    ])
]
a_add: [
    AddGroup({"tag": "h1"}, [
        AddGroup({"client": "a", "tag": "caret"}, []),
        AddWithGroup([]),
        AddSkip(1), AddChars("k"), AddSkip(1), AddWithGroup([]),
        AddSkip(12)
    ]),
    AddWithGroup([])
]

b_del: [
    DelWithGroup([
        DelGroup([
            DelGroup([]),
            DelChars(2)
        ]),
        DelGroup([
            DelSkip(14)
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddGroup({"tag": "pre"}, []),
        AddGroup({"tag": "p"}, [
            AddGroup({"client": "b", "tag": "caret"}, []),
            AddSkip(14)
        ])
    ])
]
