
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h2"}, [
            DocGroup({"client": "a", "tag": "caret"}, []),
            DocChars("X")
        ]),
        DocGroup({"tag": "h2"}, [
            DocChars("3"), DocGroup({"client": "c", "tag": "caret"}, []),
            DocChars("j Nb1"), DocGroup({"client": "b", "tag": "caret"}, []),
            DocChars("1fc  ilo woul 4e t\'s up with you?")
        ])
    ])
]

a_del: [
    DelWithGroup([
        DelWithGroup([
            DelGroup([])
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddWithGroup([
            AddGroup({"tag": "caret", "client": "a"}, []),
            AddChars("3")
        ])
    ])
]

b_del: [
    DelGroup([
        DelWithGroup([
            DelWithGroup([]),
            DelSkip(1)
        ]),
        DelWithGroup([
            DelSkip(1), DelWithGroup([]),
            DelSkip(2), DelChars(3), DelGroup([]),
            DelChars(1)
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddWithGroup([]),
        AddSkip(1)
    ]),
    AddWithGroup([
        AddSkip(1), AddWithGroup([]),
        AddSkip(2), AddChars("T2"), AddGroup({"client": "b", "tag": "caret"}, [])
    ])
]
