
doc:   [
    DocGroup({"tag": "h2"}, [
        DocChars(" r"), DocGroup({"tag": "caret", "client": "d"}, []),
        DocChars("iO2x3he")
    ]),
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h3"}, [
            DocGroup({"client": "a", "tag": "caret"}, []),
            DocGroup({"tag": "caret", "client": "b"}, []),
            DocChars("Q b")
        ]),
        DocGroup({"tag": "h3"}, [
            DocChars("4"), DocGroup({"client": "c", "tag": "caret"}, []),
            DocChars("lE qu")
        ])
    ]),
    DocGroup({"tag": "pre"}, [
        DocGroup({"tag": "caret", "client": "e"}, []),
        DocChars(" E")
    ]),
    DocGroup({"tag": "h2"}, [
        DocChars("L1"), DocGroup({"tag": "caret", "client": "f"}, []),
        DocChars("8c j 77XUt")
    ]),
    DocGroup({"tag": "pre"}, [
        DocChars(" WLeTx 6  HI t 7617Fnlello world!QWhat\'s up with you?")
    ])
]

a_del: [
    DelWithGroup([
        DelSkip(2), DelWithGroup([]),
        DelSkip(7)
    ]),
    DelGroup([
        DelGroup([
            DelGroup([]),
            DelGroup([]),
            DelChars(1), DelSkip(2)
        ]),
        DelWithGroup([
            DelChars(1), DelGroup([]),
            DelSkip(1)
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddSkip(2), AddWithGroup([]),
        AddSkip(7)
    ]),
    AddGroup({"tag": "h3"}, [
        AddGroup({"tag": "caret", "client": "a"}, []),
        AddChars("0"), AddGroup({"client": "b", "tag": "caret"}, []),
        AddChars(" "), AddSkip(2)
    ]),
    AddWithGroup([
        AddSkip(1), AddChars("I"), AddGroup({"client": "c", "tag": "caret"}, [])
    ])
]

b_del: [
    DelWithGroup([
        DelSkip(1), DelChars(1), DelGroup([]),
        DelChars(1), DelSkip(6)
    ]),
    DelWithGroup([
        DelWithGroup([])
    ])
]
b_add: [
    AddGroup({"tag": "bullet"}, [
        AddWithGroup([
            AddChars("S"), AddSkip(7)
        ])
    ]),
    AddWithGroup([
        AddWithGroup([
            AddChars("1"), AddGroup({"tag": "caret", "client": "d"}, [])
        ])
    ])
]
