
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "pre"}, [
            DocChars("wO4M lvpIWUo7hT")
        ])
    ]),
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "p"}, [
            DocChars("e"), DocGroup({"tag": "caret", "client": "a"}, []),
            DocChars("J 8"), DocGroup({"tag": "caret", "client": "c"}, []),
            DocChars("4")
        ]),
        DocGroup({"tag": "p"}, [
            DocChars("J  eB"), DocGroup({"client": "b", "tag": "caret"}, []),
            DocChars(" hat\'s up with you?")
        ])
    ])
]

a_del: [
    DelWithGroup([
        DelWithGroup([
            DelSkip(15)
        ])
    ]),
    DelWithGroup([
        DelGroup([
            DelChars(1), DelGroup([]),
            DelSkip(5)
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddWithGroup([
            AddSkip(1), AddChars(" "), AddGroup({"tag": "caret", "client": "a"}, []),
            AddSkip(14)
        ])
    ]),
    AddWithGroup([
        AddGroup({"tag": "pre"}, [
            AddChars(" "), AddSkip(5)
        ])
    ])
]

b_del: [
    DelWithGroup([
        DelWithGroup([
            DelSkip(15)
        ])
    ]),
    DelGroup([
        DelWithGroup([
            DelSkip(1), DelWithGroup([]),
            DelSkip(3), DelWithGroup([]),
            DelSkip(1)
        ]),
        DelWithGroup([
            DelSkip(5), DelGroup([]),
            DelChars(1)
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddWithGroup([
            AddSkip(15)
        ])
    ]),
    AddWithGroup([
        AddSkip(1), AddWithGroup([]),
        AddSkip(3), AddWithGroup([]),
        AddSkip(1)
    ]),
    AddWithGroup([
        AddSkip(5), AddChars("PI"), AddGroup({"client": "b", "tag": "caret"}, [])
    ])
]
