LHS parenethesis could be removed sometimes

[ColemanTom]

Describe the style change

If you have (...) = something, the LHS parenthesis, I think, should not be kept.

Examples in the current Black style

def a():
    return 1, 2, 3

(b) = a()[0]
(c, *_) = a()

Desired style

def a():
    return 1, 2, 3

b = a()[0]
c, *_ = a()