
doc:   [
    DocGroup({"tag": "h1"}, [
        DocGroup({"client": "a", "tag": "caret"}, []),
        DocChars("T"), DocGroup({"tag": "caret", "client": "c"}, []),
        DocChars("llo world!")
    ]),
    DocGroup({"tag": "p"}, [
        DocGroup({"tag": "caret", "client": "b"}, []),
        DocChars("What\'s up with you?")
    ])
]

a_del: [
    DelGroup([
        DelGroup([]),
        DelChars(1), DelWithGroup([]),
        DelSkip(6), DelChars(4)
    ]),
    DelGroup([
        DelWithGroup([]),
        DelSkip(1), DelChars(2), DelSkip(16)
    ])
]
a_add: [
    AddGroup({"tag": "p"}, [
        AddChars("L"), AddGroup({"tag": "caret", "client": "a"}, []),
        AddWithGroup([]),
        AddSkip(6), AddChars("4"), AddWithGroup([]),
        AddSkip(1)
    ]),
    AddGroup({"tag": "bullet"}, [
        AddGroup({"tag": "p"}, [
            AddChars(" l"), AddSkip(16)
        ])
    ])
]

b_del: [
    DelGroup([
        DelWithGroup([]),
        DelSkip(1), DelWithGroup([]),
        DelSkip(8), DelChars(2)
    ]),
    DelGroup([
        DelGroup([]),
        DelSkip(19)
    ])
]
b_add: [
    AddGroup({"tag": "bullet"}, [
        AddGroup({"tag": "pre"}, [
            AddChars("i  "), AddGroup({"tag": "caret", "client": "b"}, []),
            AddWithGroup([]),
            AddSkip(1), AddWithGroup([]),
            AddSkip(8), AddChars(" V"), AddSkip(19)
        ])
    ])
]
