Line too long: Lambda in dictionary value

[alexbecker]

Input (which I also think is a good format for output):

{
    "some very long dictionary key string goes here":
        lambda: some_very_long_function_name(x, y, z)
}

Output:

{
    "some very long dictionary key string goes here": lambda: some_very_long_function_name(
        x, y, z
    )
}

Note that the second line is >88 characters.

Possibly related to #781?

Operating system: Linux
Python version: 3.6.3
Black version: 19.3b0
Does also happen on master: yes

[DANIELF01]

@JelleZijlstra this looks similar to to my comment: #1161 (comment). At least in the sense that line length does not see to be respected for long/odd dictionary declarations.