I ran doctest on LibRef 17.2 json saved as .txt. There are 4 failures: 2 are clearly doc issues, the other 2 I do not know. I hope someone reads this who is already familiar

DOC PATCHES
    dumps(2 + 1j, cls=ComplexEncoder)
should be
    json.dumps(2 + 1j, cls=ComplexEncoder)
and
    JSONEncoder().encode({"foo": ["bar", "baz"]})
should be
    json.JSONEncoder().encode({"foo": ["bar", "baz"]})

Needing similar additions in example code (not caught by doctest) are
           return JSONEncoder.default(self, o)
        for chunk in JSONEncoder().iterencode(bigobject):

Those fixes leave 2 failures I an unclear about and hope a json expert will comment on.

1.'''
Failed example:
    print(json.dumps({'4': 5, '6': 7}, sort_keys=True, indent=4))
Expected:
    {
        "4": 5,
        "6": 7
    }
Got:
    {
        "4": 5, 
        "6": 7
    }
'''
The difference is that json puts a trailing space after '5,'. Should it? or should one be added to the doc?

2. '''
Failed example:
    list(ComplexEncoder().iterencode(2 + 1j))
Expected:
    ['[', '2.0', ', ', '1.0', ']']
Got:
    ['[2.0', ', 1.0', ']']
'''
Without knowing how the default iterencode interacts with the overwridden .default() method, I have no idea.