doc:   [
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]

a_del: [
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        DelWithGroup([
            DelChars(1), DelGroup([]),
            DelSkip(45)
        ])
    ]),
    DelWithGroup([
        DelGroup([
            DelSkip(4), DelChars(1)
        ]),
        DelGroup([
            DelGroup([]),
            DelChars(1)
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]
a_add: [
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            AddChars("c"), AddSkip(45)
        ])
    ]),
    AddWithGroup([
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            AddChars("x")
        ])
    ])
]

b_del: [
    DelWithGroup([
        DelWithGroup([
            DelSkip(1), DelWithGroup([]),
            DelSkip(45)
        ])
    ]),
    DelWithGroup([
        DelWithGroup([
            DelSkip(5)
        ]),
        DelGroup([
            DelWithGroup([]),
            DelSkip(1)
        ])
    ]),
    DelWithGroup([
        DelWithGroup([
            DelGroup([])
        ])
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]
b_add: [
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            AddSkip(45)
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    ]),
    AddWithGroup([
        AddWithGroup([
            AddChars("E"), AddSkip(1), AddGroup({"tag": "caret", "client": "c"}, []),
            AddSkip(4)
        ]),
        AddGroup({"tag": "p"}, [
            AddWithGroup([]),
            AddSkip(1)
        ])
    ]),
    AddWithGroup([
        AddWithGroup([])
    ])
]